US2983339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential disc brake
Assignee: Ampex Corp
•
Filing: 1959-08-13
•
Granted: 1961-05-09
•
Expires: 1979-08-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Neff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:06
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D55/46; F16D59/00; F16D59/02; H; H02; H02K; H02K7/00; H02K7/10; H02K7/102; F16D2055/0004; F16D2055/0058; F16D2055/0062; F16D2065/383; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |