Patent US3422682A successfully refreshed from Google Patents.
US3422682A
Expired / Lapsed
US
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Hydrostatic densitometer
Assignee: International Synthetic Rubber Co Ltd
•
Filing: 1965-09-08
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Granted: 1969-01-21
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Reginald David Evans
- 👤 Peter Brian Knights
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/46; G01L; G01L7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2604778A
Cited
US2886051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |