US3051037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential refractometer
Assignee: Phillips Petroleum Co
•
Filing: 1957-12-26
•
Granted: 1962-08-28
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Broerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:56
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736332A
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US2594405A
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US2583973A
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US2724304A
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US2857799A
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US2771149A
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US2902048A
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US2890571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |