Patent US345420A successfully refreshed from Google Patents.
US1093307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherometer.
Assignee: Individual
•
Filing: 1910-12-30
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Granted: 1914-04-14
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Expires: 1930-12-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/20; G01B5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1917-04-13 | 1917-10-13 | 1918-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-04-13 | 1921-10-13 | 1922-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-04-13 | 1925-10-13 | 1926-04-14 | $7700.00 | Window Closed / Lapsed |