US2842421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic indicators
Assignee: Individual
•
Filing: 1951-07-06
•
Granted: 1958-07-08
•
Expires: 1971-07-06
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Jean Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:08
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324054A
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US860666A
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GB190721746A
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GB190803077A
Cited
US1392430A
Cited
US1785478A
Cited
US2127331A
Cited
US2125983A
Cited
US2176777A
Cited
US2363799A
Cited
US2606093A
Cited
US2619933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |