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US2957957A
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US
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Assignee: Individual
•
Filing: 1956-01-13
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Granted: 1960-10-25
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:22
CPC Classifications
A; A63; A63H; A63H5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1279831A
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US1390768A
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US1628723A
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US1861222A
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US1672351A
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US1934859A
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US2015962A
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US2085198A
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US2221963A
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US2509345A
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US2834423A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |