US2315248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pseudo-extension of frequency bands
Assignee: Individual
•
Filing: 1940-07-30
•
Granted: 1943-03-30
•
Expires: 1960-07-30
Abstract
No abstract record available.
Inventors
- 👤 Rosa Louis A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:31
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/42; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; C; C01; C01B; C01B13/00; C01B13/10; C01B13/11; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/342; C07; C07C; C07C2/00; C07C2/76; C07C2/80; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/40; C07D; C07D323/00; C07D323/02; C10; C10G; C10G15/00; F; F17; F17C; F17C13/00; F17C13/02; G; G10; G10L; G10L21/00; H01; H01J; H01J37/00; H01J37/32; H01J37/32009; H01J37/32055; H03; H03G; H03G5/00; H03G5/16; H03G5/18; H03G5/20; H04; H04B; H04B1/00; H04B1/66; C01B2201/00; C01B2201/10; C01B2201/14; C01B2201/60; C01B2201/66
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) | 1946-03-29 | 1946-09-28 | 1947-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-29 | 1950-09-28 | 1951-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-29 | 1954-09-28 | 1955-03-30 | $7700.00 | Window Closed / Lapsed |