US2977935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure differential operated brake booster mechanism
Assignee: Individual
•
Filing: 1958-09-10
•
Granted: 1961-04-04
•
Expires: 1978-09-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn T Randol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/228; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275697A
Cited
US2331238A
Cited
US2322063A
Cited
US2646665A
Cited
US2745383A
Cited
US2832316A
Cited
US2894490A
Cited
US2828719A
Cited
US2842101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |