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US2749538A
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Assignee: Individual
•
Filing: 1952-12-16
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Granted: 1956-06-05
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Expires: 1972-12-16
Abstract
No abstract record available.
Inventors
- 👤 Cooper Benjamin
- 👤 Albert F Hohmann
- 👤 Joseph S Wapner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
H; H03; H03M; H03M1/00; G; G01; G01G; G01G23/00; G01G23/18; G06; G06M; G06M1/00; G06M1/27; G06M1/276; H03M1/12; H03M1/124; Y; Y10; Y10S; Y10S177/00; Y10S177/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1446963A
Cited
US1577012A
Cited
US2192421A
Cited
US2238363A
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US2385323A
Cited
US2496585A
Cited
US2666912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |