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Patent US1958280A successfully refreshed from Google Patents.
US1958280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope
Assignee: Bausch and Lomb Inc
•
Filing: 1931-12-05
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Granted: 1934-05-08
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Expires: 1951-12-05
Abstract
No abstract record available.
Inventors
- 👤 William L Patterson
- 👤 George B Gallasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:09
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24
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) | 1937-05-07 | 1937-11-06 | 1938-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-07 | 1941-11-06 | 1942-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-07 | 1945-11-06 | 1946-05-08 | $7700.00 | Window Closed / Lapsed |