Patent US2356334A successfully refreshed from Google Patents.
Patent US2797650A successfully refreshed from Google Patents.
US2797650A
Expired / Lapsed
US
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Railway vehicle
Assignee: Alco Products Inc
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Filing: 1951-12-26
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Granted: 1957-07-02
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Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Ross Alexander
- 👤 Adelbert C Wintemberg
- 👤 Thomas R Gilchrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:22
CPC Classifications
B; B61; B61F; B61F3/00; B61F3/02; B61F3/04; B61F3/06
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |