Patent US2025892A successfully refreshed from Google Patents.
US2025892A
Expired / Lapsed
US
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Telescopic bifocal lens
Assignee: Univis Lens Co
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Filing: 1933-10-10
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Granted: 1935-12-31
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Expires: 1953-10-10
Abstract
No abstract record available.
Inventors
- 👤 Polackoff Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:21
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/08; G02C7/088; G02B; G02B25/00; G02B25/002; G02B25/004; G02C7/06; G02C7/086; G02C2202/00; G02C2202/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-12-30 | 1939-07-01 | 1939-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-30 | 1943-07-01 | 1943-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-30 | 1947-07-01 | 1947-12-31 | $7700.00 | Window Closed / Lapsed |