US2623255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Releasable chain stopper
Assignee: Individual
•
Filing: 1950-09-27
•
Granted: 1952-12-30
•
Expires: 1970-09-27
Abstract
No abstract record available.
Inventors
- 👤 Niels P Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:17
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/18; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US157736A
Cited
US160363A
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US176562A
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US276841A
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US678798A
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US1224148A
Cited
US1181000A
Cited
US1474680A
Cited
US1774891A
Cited
US2094516A
Cited
US2481443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |