US2997752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car door and mechanism therefor
Assignee: Paccar Inc
•
Filing: 1957-03-27
•
Granted: 1961-08-29
•
Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Thor O Henrikson
- 👤 Howard B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/009; Y; Y10; Y10S; Y10S292/00; Y10S292/32; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1049
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US791662A
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US1492874A
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US1959705A
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US2045154A
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US2058860A
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US2119574A
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US2280232A
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US2612659A
Cited
US2605515A
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US2769214A
Cited
US2799900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |