US2975785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical viewing instrument
Assignee: Bausch and Lomb Inc
•
Filing: 1957-09-26
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Granted: 1961-03-21
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Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 Gilbert J Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:33
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/005; A61B1/0051; A61B1/00163; A61B1/00165; A61B1/00174; A61B1/00177; A61B1/00183; A61B1/06; A61B1/0627; A61B1/0661; A61B1/0676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |