Patent US3307969A successfully refreshed from Google Patents.
US3307969A
Expired / Lapsed
US
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Friction material
Assignee: Acadia Elastomers Corp
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Filing: 1963-02-21
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Granted: 1967-03-07
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Robert G Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; C; C04; C04B; C04B26/00; C04B26/02; C04B26/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
FRICTION MATERIAL COMPOSED OF A HARD, DENSE COMPOSITION COMPRISING ASBESTOS FIBER AND ORGANIC BINDER, HAVING DISTRIBUTED THERETHROUGH AT LEAST APPROXIMATELY 5% BY WEIGHT THEREOF OF COMMINUTED EXPANDED PERLITE SIZED SUBSTANTIALLY BETWEEN ABOUT 1-50 MICRONS AND OF A BULK DENSITY OF ABOUT 4-30 LBS./CU.FT.
Claim 2
Dependent Claim
43 words
FRICTION MATERIAL COMPOSED OF A HARD, DENSE COMPOSITION COMPRISING ASBESTOS FIBER AND ORGANIC BINDER, HAVING DISTRIBUTED THERETHROUGH AT LEAST APPROXIMATELY 5% BY WEIGHT THEREOF OF COMMINUTED EXPANDED PERLITE SIZED SUBSTANTIALLY BETWEEN ABOUT 1-50 MICRONS AND OF A BULK DENSITY OF ABOUT 4-30 LBS./CU.FT.
References Cited (Backward Citations)
US2600812A
Cited
US2159935A
Cited
US2211354A
Cited
US2402474A
Cited
US2626864A
Cited
US2852368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |