US2048604A
Expired / Lapsed
US
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Electromagnetic coupling device
Assignee: Individual
•
Filing: 1936-03-24
•
Granted: 1936-07-21
•
Expires: 1956-03-24
Abstract
No abstract record available.
Inventors
- 👤 William G H Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/06; H04N1/0671; H04N1/0678; H04M; H04M11/00; H04M11/06; H04N1/00095; H04N1/00103; H04N1/08; H04N1/0886; H04N1/32; H04N1/36; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19633; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-07-21 | 1940-01-20 | 1940-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-21 | 1944-01-20 | 1944-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-21 | 1948-01-20 | 1948-07-21 | $7700.00 | Window Closed / Lapsed |