Patent US2620937A successfully refreshed from Google Patents.
US2620937A
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US
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Drum hoisting and conveying apparatus
Assignee: Texaco Inc
•
Filing: 1949-09-21
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Granted: 1952-12-09
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Expires: 1969-09-21
Abstract
No abstract record available.
Inventors
- 👤 Ben E Halloran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2028976A
Cited
US2272447A
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US2447300A
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US2512409A
Cited
US2497118A
Cited
US2545021A
Cited
US2539233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |