Patent US1269422A successfully refreshed from Google Patents.
US1269422A
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US
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Assignee: American Optical Corp
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Filing: 1917-11-24
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Granted: 1918-06-11
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Expires: 1937-11-24
Abstract
No abstract record available.
Inventors
- 👤 Robert Leitch Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/12; G02B3/14; G02C; G02C7/00; G02C7/02; G02C7/08; G02C7/081; G02C7/085
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) | 1921-06-10 | 1921-12-10 | 1922-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-06-10 | 1925-12-10 | 1926-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-06-10 | 1929-12-10 | 1930-06-11 | $7700.00 | Window Closed / Lapsed |