Mesothelioma Lawyers from the Law Offices of Clapper, Patti, Schweizer & Mason

Our mesothelioma lawyers are known across the nation for their expertise and success over the past 25 years in handling lawsuits for people with mesothelioma and other asbestos cancer disease. We have recovered hundreds of millions of dollars for our clients.

Experienced Mesothelioma Law Partners

When you are seeking compensation for exposure to asbestos, you deserve an empathetic team of lawyers and investigative experts whom you trust.

The lawyers, investigators, paralegals and administrative staff at Clapper, Patti, Schweizer & Mason have proven experience in litigating, trying and settling asbestos and mesothelioma cases over many years. They will work closely with you to deliver caring, prompt and comprehensive representation.

• Jack C. Clapper, Founder
  Among the first lawyers in California to devote a practice almost entirely to victims of mesothelioma and other asbestos-related diseases. He is recognized nationally as a pioneer in the field. A graduate of Hastings College of Law in San Francisco, he received his Juris Doctor degree in 1978.

  In the 1960s Mr. Clapper was a fighter pilot in the United States Air Force and served in combat in Vietnam.

  He is a member of the American Trial Lawyers’ Association the California Association of Consumer attorneys, Trial Lawyers for Public Justice, San Francisco Trial Lawyers Association among other professional organizations. He and the attorneys working with him have obtained substantial jury decisions, including several multi-million dollar verdicts.

  Learn more and contact Jack Clapper »

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• Steven J. Patti
  Was named one of Northern California’s “Super Lawyers” by Law & Politics magazine. He has spent most of his legal career representing injured workers and their families, with emphasis on mesothelioma and other asbestos cancer cases. An accomplished trial lawyer, he also works on all pre-trial phases of the cases handled by the firm.

  Mr. Patti has represented plaintiffs in individual trials as well as in several consolidated actions involving multiple plaintiffs and defendants. He has tried several cases to verdicts in excess of a million dollars. He frequently makes presentations on asbestos litigations at national conferences of asbestos lawyers.

  Mr. Patti is a 1992 graduate of the University of California, Hastings College of Law and received a bachelor’s degree from Indiana University, Bloomington. Mr. Patti is a member of the American Trial Lawyers’ Association, California Association of Consumer Attorneys, Trial Lawyers for Public Justice and San Francisco Trial Lawyers Association, among other professional organizations.

  Learn more and contact Steven J. Patti »

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• Deborah F. Schweizer
  Graduate of the University of California, Berkeley, received her law degree from New York Law School in 1986. She has spent most of her career litigating complex cases including compensation for pollution cleanup, failed financial institutions, injuries from defective products and acts of sexual harassment and discrimination.

  In the early 1990’s, Ms. Schweizer began to focus on clients who have been injured by exposure to asbestos. More recently she has represented people diagnosed with mesothelioma and has tried numerous cases to verdict – including multiple verdicts in excess of a million dollars.

  A member of the American Trial Lawyers Association and Consumer Attorneys of California, she is also a member of the Queen’s Bench.

  Learn more and contact Deborah F. Schweizer »

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• John P. Mason
  1997 graduate of San Francisco Law School, has devoted his career to victims of mesothelioma and other asbestos diseases. Involved in all aspects of litigation, he is best known for his ability to develop vital witness and documentary evidence supporting victims’ claims.

  He is one of the foremost experts in product identification, that is, the gathering of evidence to prove which companies’ asbestos products were used at a given location. He supervises the investigative team at the firm and coordinates legal discovery. Mr. Mason is currently a member of the State Bar of California and the Consumer Attorneys of California.

  Learn more and contact John P. Mason »

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• Barry K. Matson
  1995 graduate of San Joaquin College of Law and California State University, Fresno, is admitted to practice law in California and the United States District Courts in the Eastern and Northern districts of California. He is presently a member of the San Francisco Trial Lawyers Association and the State Bar of California. He is primarily involved with pre-trial discovery and investigation, legal research and writing, and case management.

  Learn more and contact Barry K. Matson »

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• Christine A. Renken
  Our newest member to our team of lawyers, received her law degree from Loyola Law School in 2004 and her bachelor's degree from the University of Southern California. Ms. Renken is admitted to practice law in California, the United States District Court in the Northern, Eastern, Southern and Central districts and the United States Court of Appeals for the Ninth Circuit. She earned the First Honors Award for the highest grade in her Trial Advocacy class and has focused her career on all aspects of litigation, including discovery and pre-trial motions. She is currently a member of the American Bar Association and the San Francisco Trial Lawyers Association.

  Learn more and contact Christine A. Renken »

Attorneys You Can Trust

Clients have confidence in our law firm and trial lawyers due to a long track record in trial success, asbestos product identification, asbestos exposure investigation and the science and medicine of mesothelioma.

Determining The Basis For Your Mesothelioma Lawsuit

Skilled law investigation is often the most significant aspect of building a compelling mesothelioma case.

Investigators at Clapper, Patti, Schweizer & Mason first interview each client personally to gain basic background information – their work history and length of time on the job, job duties and co-workers. Our team tracks down and interviews important witnesses and puts the evidence together to prove their case.

Our investigators also obtain construction records, military records, union records and employment records to help prove our cases. The more asbestos companies we can identify who caused you or a loved one to develop mesothelioma, the more likely you are to receive the most substantial compensation.

Our law investigators may spend a great deal of time on the telephone with clients to determine how, when and where their exposure occurred. Even in instances where evidence appears obvious, there may be multiple asbestos companies responsible. Even when our clients know very little about the products to which they were exposed, our investigators can often help us build a strong case by obtaining important records and by finding witnesses who know more about the asbestos products used in the client’s workplace. Thorough case investigation requires determination, experience, integrity and patience — the backbone of the team at Clapper, Patti, Schweizer & Mason.

From the start, our paralegals compile a comprehensive file of information provided by our investigators, physicians and you. This file is an integral part of your case and our paralegals are involved every step of the way Our paralegals also help organize the evidence we develop against the asbestos companies so that it is ready for presentation in court. They also assist the attorneys with the process of legal discovery, where we force the asbestos companies to provide us with information and testimony that may be critical to prove our cases.

Our mesothelioma attorneys have been representing families coping with asbestos-related diseases for more than 25 years and have recovered hundreds of millions of dollars for their asbestos and mesothelioma clients.

Speak with us today about what our law firm can do for you and your family. Contact the asbestos cancer lawyers at Clapper, Patti, Schweizer & Mason a today for a free consultation at 1–800–440–4262.