US2995065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractors
Assignee: American Optical Corp
•
Filing: 1956-12-18
•
Granted: 1961-08-08
•
Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 John R Wright
- 👤 George F Schenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:14
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/028; A61B3/0285; Y; Y10; Y10T; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563717A
Cited
US1172827A
Cited
US1596717A
Cited
US1666406A
Cited
US1804691A
Cited
US1945940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |