Patent US1213791A successfully refreshed from Google Patents.
US2465083A
Expired / Lapsed
US
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Connecting parts of optical instruments
Assignee: American Optical Corp
•
Filing: 1943-11-18
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Granted: 1949-03-22
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Expires: 1963-11-18
Abstract
No abstract record available.
Inventors
- 👤 Albin A Gradisar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:06
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/14; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE662591C
Cited
US1138848A
Cited
US1321521A
Cited
US1848879A
Cited
US894594A
Cited
US1102009A
Cited
US1104179A
Cited
US1283963A
Cited
US1346138A
Cited
US1760827A
Cited
US1916194A
Cited
US1941235A
Cited
US1982044A
Cited
US2111244A
Cited
US2218884A
Cited
GB501710A
Cited
US2224793A
Cited
US2260712A
Cited
US2197184A
Cited
US2241596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |