US2727436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic mountings
Assignee: American Optical Corp
•
Filing: 1950-07-29
•
Granted: 1955-12-20
•
Expires: 1970-07-29
Abstract
No abstract record available.
Inventors
- 👤 Basil W Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:07
CPC Classifications
G; G02; G02C; G02C1/00; G02C1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US468886A
Cited
US1425919A
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US1109285A
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US1235842A
Cited
US2071893A
Cited
US2093513A
Cited
US2311991A
Cited
US2345065A
Cited
US2513214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |