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US2919491A
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Assignee: Individual
•
Filing: 1957-12-03
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Granted: 1960-01-05
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 George H Darrell
- 👤 Charles E Channing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:19
CPC Classifications
A; A63; A63B; A63B57/00; A63B69/00; A63B69/36; A63B69/3676; A63B69/3685
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US372921A
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US511377A
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US876720A
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US915274A
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US1459381A
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GB223044A
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US1702689A
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US2204974A
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US2251640A
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US2670209A
Cited
US2691829A
Cited
US2723125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |