US1325936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rendering the true or apparent focal length of objectives independent of changes of temperature.
Assignee: Societe dOptique et de Mecanique de Haute Precision
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Filing: 1919-04-16
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Granted: 1919-12-23
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Expires: 1939-04-16
Abstract
No abstract record available.
Inventors
- 👤 Henri Fouasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:17
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00163; A61B1/00188; A61B1/00064; A61B1/00071; A61B1/0008; A61B1/00096; G; G02; G02B; G02B7/00; G02B7/02; G02B7/028
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) | 1922-12-22 | 1923-06-23 | 1923-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-12-22 | 1927-06-23 | 1927-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-12-22 | 1931-06-23 | 1931-12-23 | $7700.00 | Window Closed / Lapsed |