US2928463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain car door
Assignee: Individual
•
Filing: 1954-06-07
•
Granted: 1960-03-15
•
Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 Pierson Bernice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:33
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/001; B61D19/002; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1034; Y10T428/00; Y10T428/24; Y10T428/2419
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US265302A
Cited
US1992249A
Cited
US2249927A
Cited
US2310860A
Cited
US2507659A
Cited
US2495003A
Cited
US2595087A
Cited
US2599443A
Cited
US2803299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |