US2539926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video coupler
Assignee: Duracell Inc USA
•
Filing: 1947-06-06
•
Granted: 1951-01-30
•
Expires: 1967-06-06
Abstract
No abstract record available.
Inventors
- 👤 Charles E Rainwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:31
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36; H03H; H03H7/00; H03H7/01; H03H7/0138; H03H7/0146; H03H7/17; H03H7/1741; H03H7/175
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21176E
Cited
US1490041A
Cited
US1445919A
Cited
US1575552A
Cited
US1973037A
Cited
US1975620A
Cited
US2254214A
Cited
US2319594A
Cited
US2370399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |