Patent US2931323A successfully refreshed from Google Patents.
US2931323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hatch arrangement
Assignee: PUTLMAN STANDARD CAR Manufacturing COMPA
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Filing: 1954-07-29
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Granted: 1960-04-05
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Expires: 1974-07-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond M Shaver
- 👤 Archie M Miers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:46
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/12; B61D17/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2309237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |