Patent US1631559A successfully refreshed from Google Patents.
US1631559A
Expired / Lapsed
US
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Ophthalmic test-lens frame
Assignee: Bausch and Lomb Inc
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Filing: 1922-07-11
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Granted: 1927-06-07
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Expires: 1942-07-11
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/028; A61B3/04; G; G02; G02C; G02C13/00; G02C13/003
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) | 1930-06-06 | 1930-12-06 | 1931-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-06-06 | 1934-12-06 | 1935-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-06-06 | 1938-12-06 | 1939-06-07 | $7700.00 | Window Closed / Lapsed |