US2482698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical lens means having a nonspherical refracting surface
Assignee: American Optical Corp
•
Filing: 1945-02-15
•
Granted: 1949-09-20
•
Expires: 1965-02-15
Abstract
No abstract record available.
Inventors
- 👤 Edgar D Tillyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:43
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US4786A
Cited
GB190903444A
Cited
US1416947A
Cited
US1536828A
Cited
US1619341A
Cited
US1905644A
Cited
US2170979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-19 | 1953-03-21 | 1953-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-19 | 1957-03-21 | 1957-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-19 | 1961-03-21 | 1961-09-20 | $7700.00 | Window Closed / Lapsed |