US2921701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling device
Assignee: TEXAS BITULITHIC Co
•
Filing: 1954-06-14
•
Granted: 1960-01-19
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Frank R Ireland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:20
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US477621A
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US2030045A
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US2360740A
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US2486479A
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US2411498A
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US2412845A
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US2699879A
Cited
US2702137A
Cited
US2678741A
Cited
US2643515A
Cited
US2674385A
Cited
US2725996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |