US2850943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-supporting lens holders
Assignee: Individual
•
Filing: 1954-04-26
•
Granted: 1958-09-09
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 George G Grineff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:46
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US210068A
Cited
US803435A
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US1755759A
Cited
FR791885A
Cited
US2147482A
Cited
US2217514A
Cited
US2254498A
Cited
US2453064A
Cited
FR915421A
Cited
US2651235A
Cited
US2613104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |