US2635215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency display sign
Assignee: Individual
•
Filing: 1949-02-26
•
Granted: 1953-04-14
•
Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Frank M Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:58
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121829A
Cited
US2231035A
Cited
US2475063A
Cited
US2459988A
Cited
US2488169A
Cited
US2476607A
Cited
US2546591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |