US2887543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time switch
Assignee: Individual
•
Filing: 1956-10-22
•
Granted: 1959-05-19
•
Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Edward J Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:07
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/26; G04C23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566549A
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US2141024A
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US1964909A
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US2078781A
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US2123052A
Cited
US2174331A
Cited
US2149424A
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US2272237A
Cited
US2323411A
Cited
US2495462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |