US2715539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Box car door safety latch
Assignee: Pullman-Standard Car Manufacturing Co
•
Filing: 1951-08-22
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Granted: 1955-08-16
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Expires: 1971-08-22
Abstract
No abstract record available.
Inventors
- 👤 John H Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:55
CPC Classifications
B; B61; B61D; B61D19/00; Y; Y10; Y10S; Y10S292/00; Y10S292/30; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1006; Y10T292/1007; Y10T292/1013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |