US3144200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for cryogenic adsorption pumping
Assignee: Individual
•
Filing: 1962-10-17
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Granted: 1964-08-11
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Expires: 1982-10-17
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Taylor
- 👤 Angus L Hunt
- 👤 John E Omohundro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:12
CPC Classifications
F; F04; F04B; F04B37/00; F04B37/06; F04B37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A CRYOGENIC ADSORPTION PUMP OF THE CLASS DESCRIBED HEREIN, GAS ADSORPTION MEANS DISPOSED IN AN EVACUATED CHAMBER AND COMPRISING (A) A SURFACE COOLED TO A TEMPERATURE OF APPROXIMATELY 11*5., AND (B) A SOLIDIFIED LAYER OF GAS HAVING A VAPOR PRESSURE AT APPROXIMATELY 11*K. LESS THAN THE PRESSURE OF SAID EVACUATED CHAMBER, SAID SOLIDIFIED LAYER BEING ADHERED TO SAID SURFACE.
Claim 2
Dependent Claim
60 words
IN A CRYOGENIC ADSORPTION PUMP OF THE CLASS DESCRIBED HEREIN, GAS ADSORPTION MEANS DISPOSED IN AN EVACUATED CHAMBER AND COMPRISING (A) A SURFACE COOLED TO A TEMPERATURE OF APPROXIMATELY 11*5., AND (B) A SOLIDIFIED LAYER OF GAS HAVING A VAPOR PRESSURE AT APPROXIMATELY 11*K. LESS THAN THE PRESSURE OF SAID EVACUATED CHAMBER, SAID SOLIDIFIED LAYER BEING ADHERED TO SAID SURFACE.
References Cited (Backward Citations)
US2985356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |