US2868075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical lenses
Assignee: Individual
•
Filing: 1953-10-23
•
Granted: 1959-01-13
•
Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 Carl F Bivens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:24
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/10; G02C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1182739A
Cited
US1230136A
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US1304421A
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US1918999A
Cited
US2033101A
Cited
US2060104A
Cited
US2320375A
Cited
US2330663A
Cited
US2727843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |