US2482516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump car door lock
Assignee: Keystone Industries Inc
•
Filing: 1946-10-16
•
Granted: 1949-09-20
•
Expires: 1966-10-16
Abstract
No abstract record available.
Inventors
- 👤 Jay R Sheesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105948A
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US1109607A
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US1236527A
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US1584841A
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US1633762A
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USRE15831E
Cited
US1469352A
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US1669133A
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US1627801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |