US2638677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sine bar
Assignee: Individual
•
Filing: 1950-04-21
•
Granted: 1953-05-19
•
Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
- 👤 Albert H Sheriff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:47
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/24; G01B5/242; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1237721A
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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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |