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US2875540A
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Assignee: Individual
•
Filing: 1954-06-01
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Granted: 1959-03-03
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Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137823A
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US1271804A
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US1929908A
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US2150748A
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US2637927A
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US2598890A
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US2573413A
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US2630644A
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US2624143A
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US2730824A
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US2759281A
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |