US2616587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keeper ring construction
Assignee: Individual
•
Filing: 1949-05-14
•
Granted: 1952-11-04
•
Expires: 1969-05-14
Abstract
No abstract record available.
Inventors
- 👤 Charles L Petch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
F; F02; F02M; F02M63/00; F02F; F02F1/00; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/18; F02M2700/00; F02M2700/05; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212; Y10T292/214
Claims Analysis
Total Claims: 0
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |