Patent US3399573A successfully refreshed from Google Patents.
US3399573A
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Method and apparatus for determining relative densities
Assignee: Individual
•
Filing: 1965-06-08
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Granted: 1968-09-03
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Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Yves M Ponsar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1621535A
Cited
US2089862A
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US2056187A
Cited
US2345180A
Cited
US2451604A
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FR1102129A
Cited
US2886051A
Cited
US3233453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |