US2435604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller
Assignee: AT&T Inc
•
Filing: 1944-02-19
•
Granted: 1948-02-10
•
Expires: 1964-02-19
Abstract
No abstract record available.
Inventors
- 👤 Henry C Rorden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:15
CPC Classifications
F; F42; F42B; F42B19/00; F42B19/12; B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/15; B63H1/26; B63H1/28; Y; Y10; Y10S; Y10S416/00; Y10S416/50; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1430344A
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US1640788A
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FR710766A
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US2155052A
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US2226703A
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US2340133A
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US2346972A
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US2405283A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |