Patent US3145665A successfully refreshed from Google Patents.
US3145665A
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US
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Loading hatch for freight cars
Assignee: Magor Car Corp
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Filing: 1961-07-25
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Granted: 1964-08-25
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:54
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/12; B61D17/16; B63; B63B; B63B19/00; B63B19/12; B63B19/14; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US886472A
Cited
US1269431A
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US1881451A
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US1917167A
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US2575565A
Cited
US2835211A
Cited
US2970347A
Cited
GB829473A
Cited
US3008759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |