US3211007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of surface areas of solids
Assignee: Cabot Corp
•
Filing: 1963-03-29
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Granted: 1965-10-12
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Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jaspard H Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088; G01N15/0893; G01N30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
IN THE METHOD FOR DETERMINING THE SURFACE AREA OF A SOLID MATERIAL WHEREIN A GASEOUS MIXTURE HAVING A KNOWN COMPOSITION OF AN ADSORBATE AND AN INERT GASEOUS DILUENT IS CONTINUALLY CONTACTED AAT A SUBSTANTIALLY CONSTANT PRESSURE ON A ONCE THROUGH BASIS WITH A KNOWN AMOUNT OF SAID SOLID MATERIAL AND THE CONCENTRATION OF ADSORBATE IN SAID MIXTURE IS MEASURED DOWNSTREAM OF SAID MATERIAL WHILE SAID MATERIAL IS MAINTAINED FIRST AT A TEMPERATURE AT WHICH NEITHER THE ADSORBATE NOR THE DILUENT IS ADSORBED BY THE MATERIAL TO ANY APPRECIABLE EXTENT UNTIL SAID DOWNSTREAM MEASUREMENT OF SAID MIXTURE INDICATES THE CONCENTRATION OF ADSORBATE TO BE CONSTANT, THEN THE MATERIAL IS COOLED TO A TEMPERATURE AT WHICH THE ADSORBATE IS SELECTIVELY ADSORBED BY SAID MATERIAL UNTIL SAID DOWNSTREAM MEASUREMENT OF SAID MIXTURE AGAIN INDICATES THAT THE CONCENTRATION OF THE ADSORBATE HAS RETURNED TO THE ORIGINAL CONSTANT VALUE AND THEN THE MATERIAL IS SUBJECTED TO AN EXPELLING STEP WHEREIN IT IS HEATED TO A TEMPERATURE AT WHICH NEITHER THE ADSORBATE NOR THE DILUENT IS ADSORBED BY THE MATERIAL TO ANY APPRECIABLE EXTENT UNTIL THE ADSORBED ADSORBATE IS EXPELLED THEREFROM, THE IMPROVEMENT WHICH COMPRISES DETERMINE THE VOLUME OF ADSORBATE ADSORBED AND RELEASED BY THE SAID MATERIAL BY CONTINUALLY
Claim 2
Dependent Claim
203 words
IN THE METHOD FOR DETERMINING THE SURFACE AREA OF A SOLID MATERIAL WHEREIN A GASEOUS MIXTURE HAVING A KNOWN COMPOSITION OF AN ADSORBATE AND AN INERT GASEOUS DILUENT IS CONTINUALLY CONTACTED AAT A SUBSTANTIALLY CONSTANT PRESSURE ON A ONCE THROUGH BASIS WITH A KNOWN AMOUNT OF SAID SOLID MATERIAL AND THE CONCENTRATION OF ADSORBATE IN SAID MIXTURE IS MEASURED DOWNSTREAM OF SAID MATERIAL WHILE SAID MATERIAL IS MAINTAINED FIRST AT A TEMPERATURE AT WHICH NEITHER THE ADSORBATE NOR THE DILUENT IS ADSORBED BY THE MATERIAL TO ANY APPRECIABLE EXTENT UNTIL SAID DOWNSTREAM MEASUREMENT OF SAID MIXTURE INDICATES THE CONCENTRATION OF ADSORBATE TO BE CONSTANT, THEN THE MATERIAL IS COOLED TO A TEMPERATURE AT WHICH THE ADSORBATE IS SELECTIVELY ADSORBED BY SAID MATERIAL UNTIL SAID DOWNSTREAM MEASUREMENT OF SAID MIXTURE AGAIN INDICATES THAT THE CONCENTRATION OF THE ADSORBATE HAS RETURNED TO THE ORIGINAL CONSTANT VALUE AND THEN THE MATERIAL IS SUBJECTED TO AN EXPELLING STEP WHEREIN IT IS HEATED TO A TEMPERATURE AT WHICH NEITHER THE ADSORBATE NOR THE DILUENT IS ADSORBED BY THE MATERIAL TO ANY APPRECIABLE EXTENT UNTIL THE ADSORBED ADSORBATE IS EXPELLED THEREFROM, THE IMPROVEMENT WHICH COMPRISES DETERMINE THE VOLUME OF ADSORBATE ADSORBED AND RELEASED BY THE SAID MATERIAL BY CONTINUALLY
References Cited (Backward Citations)
US2729969A
Cited
US2960870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |