US2620320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of friction material
Assignee: Raybestos Manhattan Inc
•
Filing: 1950-02-08
•
Granted: 1952-12-02
•
Expires: 1970-02-08
Abstract
No abstract record available.
Inventors
- 👤 Izador J Novak
- 👤 Henry J Cofek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:07
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/24; B29B; B29B9/00; B29B9/12; B29C43/003; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; F; F16; F16D; F16D69/00; B29K; B29K2009/00; B29K2021/00; B29K2105/00; B29K2105/25; B29K2105/251; B29K2709/00; B29K2709/12; B29L; B29L2031/00; B29L2031/748; B29L2031/7482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A FRICTION MATERIAL COMPOSITION COMPRISING FROM ABOUT 50% TO ABOUT 75% BY WEIGHT OF SHORT-FIBER ASBESTOS, FROM ABOUT 15% TO ABOUT 30% BY WEIGHT OF BINDER SOLIDS INCLUDING PEPTIZED RUBBER MATERIAL PROVIDING SAID COMPOSITION WITH FROM ABOUT 3% TO ABOUT 15% BY WEIGHT OF SAID RUBBER, BINDER VULCANIZING AGENT, UP TO ABOUT 35% BY WEIGHT FRICTION MATERIAL FIBERS, AND SOLVENT FOR SAID BINDER IN THE PROPORTION OF FROM ABOUT 5% TO ABOUT 15% BY WEIGHT OF THE COMPOSITION SOLIDS.
Claim 2
Dependent Claim
79 words
A FRICTION MATERIAL COMPOSITION COMPRISING FROM ABOUT 50% TO ABOUT 75% BY WEIGHT OF SHORT-FIBER ASBESTOS, FROM ABOUT 15% TO ABOUT 30% BY WEIGHT OF BINDER SOLIDS INCLUDING PEPTIZED RUBBER MATERIAL PROVIDING SAID COMPOSITION WITH FROM ABOUT 3% TO ABOUT 15% BY WEIGHT OF SAID RUBBER, BINDER VULCANIZING AGENT, UP TO ABOUT 35% BY WEIGHT FRICTION MATERIAL FIBERS, AND SOLVENT FOR SAID BINDER IN THE PROPORTION OF FROM ABOUT 5% TO ABOUT 15% BY WEIGHT OF THE COMPOSITION SOLIDS.
References Cited (Backward Citations)
US1264924A
Cited
US1964177A
Cited
US1932919A
Cited
US2061919A
Cited
US2052610A
Cited
US2293914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |