US2534655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic device
Assignee: Polaroid Corp
•
Filing: 1947-02-14
•
Granted: 1950-12-19
•
Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 Charles A Baratelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:40
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/10; G02C1/00; G02C1/04; G02C7/12; G02C2202/00; G02C2202/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE148616C
Cited
US1166493A
Cited
US1868362A
Cited
US2337617A
Cited
US2397243A
Cited
US2393837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |