Patent US3277772A successfully refreshed from Google Patents.
Patent US3266487A successfully refreshed from Google Patents.
Patent US4052866A successfully refreshed from Google Patents.
Patent US2828668A successfully refreshed from Google Patents.
US2828668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic mountings
Assignee: American Optical Corp
•
Filing: 1951-12-15
•
Granted: 1958-04-01
•
Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Angelis Armand De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/22; G02C5/2281; G02C5/2209; G02C2200/00; G02C2200/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US618118A
Cited
US763220A
Cited
US1384303A
Cited
US1471009A
Cited
US1530604A
Cited
US1779789A
Cited
US2698958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |