US2984798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplexer
Assignee: Individual
•
Filing: 1959-08-26
•
Granted: 1961-05-16
•
Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Harold E Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:07
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2128400A
Cited
US2422160A
Cited
US2589818A
Cited
US2643302A
Cited
US2713152A
Cited
US2779000A
Cited
US2751557A
Cited
US2701339A
Cited
US2763839A
Cited
US2806140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |