US3299713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining the surface area of finely divided substances bygas adsorption
Assignee: STROHLEIN AND CO
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Filing: 1964-06-22
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Granted: 1967-01-24
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Haul Robert
- 👤 Dumbgen Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088; G01N15/0893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
APPARATUS FOR THE DETERMINATION OF THE SURFACE AREA OF FINELY DIVIDED MATERIALS BY GAS ADSORPTION COMPRISING TWO VESSELS OF SUBSTANTIALLY THE SAME VOLUME, ONE OF WHICH CONTAINING THE SPECIMEN THE OTHER SERVING FOR COMPARATIVE PURPOSES, SAID VESSELS BEING PROVIDED WITH SEALING MEANS AND BEING CONNECTED TO A TUBE SYSTEM BY MEANS OF RESPECTIVE CAPILLARIES CLOSELY FITTING INTO THE NECK PORTIONS OF EACH OF SAID VESSELS, SAID TUBE SYSTEM PROVIDED WITH A VALVE FOR SEPARATING IT FROM THE AMBIENT ATMOSPHERE AND COMPRISING A DIFFERENTIAL MANOMETER CONNECTED IN A SYMMETRICAL ARRANGEMENT BETWEEN SAID TWO VESSELS, SAID DIFFERENTIAL MANOMETER COMPRISING A U-SHAPED TUBE CON-
Claim 2
Dependent Claim
101 words
APPARATUS FOR THE DETERMINATION OF THE SURFACE AREA OF FINELY DIVIDED MATERIALS BY GAS ADSORPTION COMPRISING TWO VESSELS OF SUBSTANTIALLY THE SAME VOLUME, ONE OF WHICH CONTAINING THE SPECIMEN THE OTHER SERVING FOR COMPARATIVE PURPOSES, SAID VESSELS BEING PROVIDED WITH SEALING MEANS AND BEING CONNECTED TO A TUBE SYSTEM BY MEANS OF RESPECTIVE CAPILLARIES CLOSELY FITTING INTO THE NECK PORTIONS OF EACH OF SAID VESSELS, SAID TUBE SYSTEM PROVIDED WITH A VALVE FOR SEPARATING IT FROM THE AMBIENT ATMOSPHERE AND COMPRISING A DIFFERENTIAL MANOMETER CONNECTED IN A SYMMETRICAL ARRANGEMENT BETWEEN SAID TWO VESSELS, SAID DIFFERENTIAL MANOMETER COMPRISING A U-SHAPED TUBE CON-
References Cited (Backward Citations)
US3059478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |