US2495609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial protractor
Assignee: Individual
•
Filing: 1945-11-06
•
Granted: 1950-01-24
•
Expires: 1965-11-06
Abstract
No abstract record available.
Inventors
- 👤 Hugo F Semrau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/10; B43L7/12; B43L9/00; G; G01; G01B; G01B3/00; G01B3/56; G01B3/563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US70547A
Cited
US924846A
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US1039901A
Cited
US1254218A
Cited
US1384105A
Cited
US1422641A
Cited
US1637933A
Cited
US1632613A
Cited
US2000926A
Cited
US2070675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |