US2902122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doors for box cars
Assignee: Youngstown Steel Door Co
•
Filing: 1957-04-16
•
Granted: 1959-09-01
•
Expires: 1977-04-16
Abstract
No abstract record available.
Inventors
- 👤 Wilfred A Beauchamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:58
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1925655A
Cited
US2257513A
Cited
US2774118A
Cited
US2682075A
Cited
US2776736A
Cited
US2804953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |