US2764031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression spring chain tightener
Assignee: AO Smith Corp
•
Filing: 1953-07-22
•
Granted: 1956-09-25
•
Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 Albert F Nystrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:56
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1442569A
Cited
FR791664A
Cited
US2068070A
Cited
US2284821A
Cited
US2453750A
Cited
US2702485A
Cited
US2625829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |