US2908872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex system
Assignee: Individual
•
Filing: 1955-03-31
•
Granted: 1959-10-13
•
Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Garoff Kenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454761A
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US2725531A
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US2607849A
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US2606248A
Cited
US2594732A
Cited
US2558664A
Cited
GB664926A
Cited
US2644930A
Cited
US2748353A
Cited
US2850624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |