US2648832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time system
Assignee: Individual
•
Filing: 1946-09-03
•
Granted: 1953-08-11
•
Expires: 1966-09-03
Abstract
No abstract record available.
Inventors
- 👤 Ervin G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:17
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/02; G04G9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2005158A
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US2188145A
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US2114500A
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US2256487A
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US2236374A
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US2137738A
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US2419550A
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US2363941A
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US2490891A
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US2313986A
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US2378383A
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US2406358A
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US2442997A
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US2462117A
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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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |