This series contains materials related to The Weiss & Klau Co.'s status as a corporation, including board minutes, resolutions, stock certificate books, and other materials. Also included are the general correspondence of the company, materials related to trademarks, and records retention schedules.

Materials related to the distribution of Weiss & Klau stock in Box 2, Folder 3 are restricted until 2043, 75 years from the date of their creation.

This series contains financial documents, including inventory records, balance sheets, account books, investment reports, sales figures, and tax returns of The Weiss & Klau Co., its related companies, and its principal investors.

The Weiss & Klau Co. moved into its home at 462-468 Broadway in 1911. This series contains legal and real estate documents relating to the purchase (and sale) of the building, lease agreements, repairs and construction work. This series also contains information relating to the partial collapse of the building in 1966. There are clippings from several New York City papers; correspondence with employees, attorneys, and actuaries; building violations; and materials relating to insurance and liability claims.

This series contains the personnel records of Weiss & Klau employees, as well as extensive materials relating to the pension plan created for employees following the building collapse in 1966.

The personnel records contained in Box 5, Folders 13 and 14, are restricted until 2042, 75 years from the last date of their creation.

Standard Coated Products, Inc. (known until 1937 as Standard Textile Products, Inc.) was Weiss & Klau's largest supplier of oilcloth and other textile products. Standard Coated was purchased by Weiss & Klau from Interchemical Corporation in 1953. This series contains correspondence, financial records, marketing reports, legal documents, clippings, and other materials relating to Standard Coated dating from both before and after its acquisition by Weiss & Klau.

Following the collapse of 462 Broadway, portions of The Weiss & Klau Co. were sold to different companies. This series contains correspondence, notes, legal, and financial documents relating to the purchase of the plastic stock window shade business by Breneman, Inc. in February 1966, the plastic film and tile business by Clopay Corporation in March 1966, and the manufacturing business of Standard Coated Products, Inc. by American Cyanamid Corporation in 1968. It also contains materials relating to the final liquidation of stock and assets of The Weiss & Klau Co. In addition, correspondence, notes, and other materials relating to unsuccessful bids to purchase Weiss & Klau, both before and after the building collapse are found here. In particular, there is a considerable amount of information relating to a possible merger with DeSoto Chemical Coatings. Finally, this series contains Dun & Bradstreet Reports on Weiss & Klau and their competitors.

The Weiss & Klau Co. regularly hosted parties and other events for its employees. This series contains programs from dinners, as well as materials relating to large parties held in honor of the fiftieth and seventy-fifth anniversaries of the company. In addition, there are company newsletters, many of which contain personal information about employees, such as wedding, birth, and death announcements, work-related news, jokes, and cartoons. This series also contains materials relating to two employee social organizations, The Quarter-Century Club and The Old Bunch. Finally, this series contains the personal correspondence of Ira L. Oppenheimer, its last president, with employees, friends, and associates.

This series consists primarily of two scrapbooks containing photographs, newsletters, newspaper clippings, certificates, advertisements, correspondence, cartoons, and other materials pertaining to The Weiss & Klau Co., its employees, its related businesses, and the Klau family. Some of these materials appear elsewhere in the collection. Many of the materials date from the early twentieth century. There are a number of group photographs taken at company dinners. Individuals have been identified in several of these photographs. One scrapbook containing oversized materials has been disbound, and the contents have been arranged in folders. The other scrapbook remains in its original condition. In addition, this series contains business-related ephemera, such as announcements and business cards, additional photographs, and a wooden printing block used by the firm of Weiss & Klau Brothers.