US2932236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anamorphosing lens system
Assignee: Bausch and Lomb Inc
•
Filing: 1955-07-05
•
Granted: 1960-04-12
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Delano Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:43
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1863099A
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US1934561A
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US1932082A
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US2017634A
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US2317790A
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US2596799A
Cited
FR1082780A
Cited
US2702493A
Cited
US2720813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |