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US2920147A
Expired / Lapsed
US
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Announcing system
Assignee: Individual
•
Filing: 1956-03-19
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Granted: 1960-01-05
•
Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jack D Sellers
- 👤 Richard J Matt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:42
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/487; H04M3/4872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2468224A
Cited
US2462435A
Cited
US2653819A
Cited
US2745904A
Cited
US2645494A
Cited
US2741530A
Cited
US2674660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |