US3318138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Osmometer for use with aqueous solutions
Assignee: Shell USA Inc
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Filing: 1965-02-01
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Granted: 1967-05-09
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Francis B Rolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:27
CPC Classifications
G; G01; G01N; G01N13/00; G01N13/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
IN AN OSMOMETER FOR THE DETERMINATION OF THE OSMOTIC PRESSURE OF AQUEOUS SOLUTIONS, WHEREIN SAID OSMOMETER COMPRISES A CELL HAVING A PAIR OF CHAMBERS SEPARATED BY A SEMI-PERMEABLE MEMBRANE, AND MEANS FOR DETERMINING THE PRESSURE IN ONE OF SAID CHAMBERS; AND WHEREIN ONE OF SAID CHAMBERS CONTAINS THE AQUEOUS SOLUTION WHOSE OSMOTIC PRESSURE IS TO BE DETERMINED AND SAID OTHER CHAMBER CONTAINS THE SOLVENT FOR SAID SOLUTION, THE IMPROVE-
References Cited (Backward Citations)
US3195346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |