US3282058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing very low gas pressures
Assignee: US Philips Corp
•
Filing: 1965-07-06
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Granted: 1966-11-01
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Expires: 1985-07-06
Abstract
No abstract record available.
Inventors
- 👤 Venema Albertus
- 👤 Prast Gijsbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:11
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F04; F04B; F04B37/00; F04B37/06; F04B37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A DEVICE FOR PRODUCING VERY LOW PRESSURES COMPRISING A COLD GAS REFRIGERATOR PROVIDED WITH A PLURALITY OF EXPANSION SPACES, AN ENCLOSURE TO BE EXHAUSTED HAVING AT LEAST ONE WALL CONSTITUTED OF A MATERIAL OF GOOD THERMAL CONDUCTIVITY, SAID ENCLOSURE HAVING A WORKING SPACE, SAID WALL BEING IN THERMAL CONTACT WITH SAID EXPANSION SPACE HAVING A HIGHER AVERAGE TEMPERATURE THAN ANOTHER EXPANSION SPACE, ONE OF THE WALLS OF SAID OTHER EXPANSION SPACE BEING IN THERMAL CONTACT WITH THE WALL ARRANGED IN THE ENCLOSURE TO BE EXHAUSTED.
Claim 2
Independent Claim
85 words
A DEVICE FOR PRODUCING VERY LOW PRESSURES COMPRISING A COLD GAS REFRIGERATOR PROVIDED WITH A PLURALITY OF EXPANSION SPACES, AN ENCLOSURE TO BE EXHAUSTED HAVING AT LEAST ONE WALL CONSTITUTED OF A MATERIAL OF GOOD THERMAL CONDUCTIVITY, SAID ENCLOSURE HAVING A WORKING SPACE, SAID WALL BEING IN THERMAL CONTACT WITH SAID EXPANSION SPACE HAVING A HIGHER AVERAGE TEMPERATURE THAN ANOTHER EXPANSION SPACE, ONE OF THE WALLS OF SAID OTHER EXPANSION SPACE BEING IN THERMAL CONTACT WITH THE WALL ARRANGED IN THE ENCLOSURE TO BE EXHAUSTED.
References Cited (Backward Citations)
FR981744A
Cited
US2966034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |