US2920501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slack adjuster
Assignee: Symington Wayne Corp
•
Filing: 1953-11-27
•
Granted: 1960-01-12
•
Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Glenn F Couch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:17
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0064; B61H15/0071; B61H15/0078; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19647; Y10T74/19651; Y10T74/19656; Y10T74/1967; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206; Y10T74/20636; Y10T74/20642; Y10T74/20654
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |