US3371499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryosorption vacuum pumping system
Assignee: Union Carbide Corp
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Filing: 1966-11-02
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Granted: 1968-03-05
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Expires: 1986-11-02
Abstract
No abstract record available.
Inventors
- 👤 Gerard F Hagenbach
- 👤 Cheng Domingo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:40
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; F; F04; F04B; F04B37/00; F04B37/06; F04B37/08; F25; F25D; F25D31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A CRYOSORPTION VACUUM PUMPING SYSTEM COMPRISING THE COMBINATION WITH A CRYOSORPTION VACUUM PUMP INCLUDING ABOSRBENT MATERIAL, MEANS HAVING EXTENDED HEAT TRANSFER SURFACES EMBEDDED THEREIN, SAID PUMP ALSO HAVING A FLUID REFRIGERANT CONDUIT IN THERMAL CONTACT WITH SAID EXTENDED SURFACES, AND A GAS LEAK-TIGHT CASING THEREFOR HAVING A PUMP PORT IN COMMUNICATION WITH SAID ADSORBENT MATERIAL; OF A RESERVOIR FOR LIQUID REFRIGERANT LOCATED WHOLLY WITHIN SAID CASING, MEANS FOR SUPPLYING LIQUID REFRIGERANT THROUGH THE WALL OF SAID CASING TO SAID RESERVOIR, MEANS PROVIDING COMMUNICATION FOR SUCH REFRIGERANT BETWEEN THE RESERVOIR AND SAID FLUID CONDUIT, AND MEANS FOR VENTING VAPOR FROM SAID CONDUIT THROUGH SAID WALL OF THE CASING.
Claim 2
Dependent Claim
107 words
A CRYOSORPTION VACUUM PUMPING SYSTEM COMPRISING THE COMBINATION WITH A CRYOSORPTION VACUUM PUMP INCLUDING ABOSRBENT MATERIAL, MEANS HAVING EXTENDED HEAT TRANSFER SURFACES EMBEDDED THEREIN, SAID PUMP ALSO HAVING A FLUID REFRIGERANT CONDUIT IN THERMAL CONTACT WITH SAID EXTENDED SURFACES, AND A GAS LEAK-TIGHT CASING THEREFOR HAVING A PUMP PORT IN COMMUNICATION WITH SAID ADSORBENT MATERIAL; OF A RESERVOIR FOR LIQUID REFRIGERANT LOCATED WHOLLY WITHIN SAID CASING, MEANS FOR SUPPLYING LIQUID REFRIGERANT THROUGH THE WALL OF SAID CASING TO SAID RESERVOIR, MEANS PROVIDING COMMUNICATION FOR SUCH REFRIGERANT BETWEEN THE RESERVOIR AND SAID FLUID CONDUIT, AND MEANS FOR VENTING VAPOR FROM SAID CONDUIT THROUGH SAID WALL OF THE CASING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |