US2975426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral one-piece folding optical frame
Assignee: Individual
•
Filing: 1959-12-09
•
Granted: 1961-03-21
•
Expires: 1979-12-09
Abstract
No abstract record available.
Inventors
- 👤 Rabb Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:14
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/14; G02C5/143; G02C5/006; G02C5/008; G02C5/02; G02C5/08; G02C5/22; G02C5/2272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |