US3116764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum method and apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1959-03-30
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Granted: 1964-01-07
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Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Robert L Jepsen
- 👤 Leonard T King
- 👤 Rene M Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:56
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; F; F04; F04B; F04B37/00; F04B37/06; F04B37/08; H01J9/00; H01J9/38; H01J9/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF CREATING A HIGH VACUUM WITHIN A STRUCTURE INITIALLY AT SUBSTANTIALLY ATMOSPHERIC PRESSURE BY MEANS OF AN ELECTRICAL GETTER-ION VACUUM PUMP AND A REFRIGERATED SORPTION APPENDAGE PUMP CONTAINING A HIGHLY SORBENT MATERIAL COMPRISING THE STEPS OF FIRST FLUSHING SAID STRUCTURE, SAID APPENDAGE PUMP, AND SAID ELECTRICAL VACUUM PUMP WITH A FLUSHING GAS WHICH HAS A CONDENSATION TEMPERATURE ABOVE THE TEMPERATURE TO WHICH SAID APPENDAGE PUMP WILL BE COOLED, THEN EVACUATING SAID STRUCTURE AND SAID ELECTRICAL VACUUM PUMP BY COOLING SAID APPENDAGE PUMP AT LEAST TO A TEMPERATURE ON THE ORDER OF THAT OF LIQUID NITROGEN, THEN SEALING SAID APPENDAGE PUMP OFF FROM SAID STRUCTURE AND SAID ELECTRICAL VACUUM PUMP, AND FINALLY EVACUATING SAID STRUCTURE WITH SAID ELECTRICAL VACUUM PUMP.
Claim 2
Independent Claim
121 words
THE METHOD OF CREATING A HIGH VACUUM WITHIN A STRUCTURE INITIALLY AT SUBSTANTIALLY ATMOSPHERIC PRESSURE BY MEANS OF AN ELECTRICAL GETTER-ION VACUUM PUMP AND A REFRIGERATED SORPTION APPENDAGE PUMP CONTAINING A HIGHLY SORBENT MATERIAL COMPRISING THE STEPS OF FIRST FLUSHING SAID STRUCTURE, SAID APPENDAGE PUMP, AND SAID ELECTRICAL VACUUM PUMP WITH A FLUSHING GAS WHICH HAS A CONDENSATION TEMPERATURE ABOVE THE TEMPERATURE TO WHICH SAID APPENDAGE PUMP WILL BE COOLED, THEN EVACUATING SAID STRUCTURE AND SAID ELECTRICAL VACUUM PUMP BY COOLING SAID APPENDAGE PUMP AT LEAST TO A TEMPERATURE ON THE ORDER OF THAT OF LIQUID NITROGEN, THEN SEALING SAID APPENDAGE PUMP OFF FROM SAID STRUCTURE AND SAID ELECTRICAL VACUUM PUMP, AND FINALLY EVACUATING SAID STRUCTURE WITH SAID ELECTRICAL VACUUM PUMP.
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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |