Patent US2601128A successfully refreshed from Google Patents.
US2601128A
Expired / Lapsed
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Refractometer with temperature compensating means
Assignee: American Optical Corp
•
Filing: 1950-01-11
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Granted: 1952-06-17
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Expires: 1970-01-11
Abstract
No abstract record available.
Inventors
- 👤 Rosenthal Paul
- 👤 Michael L Polanyi
- 👤 Gottlieb Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:18
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US620978A
Cited
US1522639A
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US1584271A
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US1760209A
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US2002183A
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US2168353A
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US2267115A
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US2142668A
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US2224726A
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US2319889A
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US2394949A
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US2441107A
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US2445499A
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US2474044A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |