US3091097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing impurities from a compressed gas
Assignee: Ingersoll Rand Co
•
Filing: 1960-08-11
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Granted: 1963-05-28
•
Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 David R Friant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/265; Y; Y10; Y10S; Y10S55/00; Y10S55/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF REMOVING IMPURITIES FROM A COMPRESSED GAS COMPRISING THE FOLLOWING STEPS IN THE ORDER NAMED, OF: (A) ALTERNATELY COMPRESSING AND COOLING THE GAS A PLURALITY OF TIMES TO PROGRESSIVELY INCREASE ITS PRESSURE EACH TIME THE GAS IS COMPRESSED AND TO ALTERNATELY INCREASE AND DECREASE ITS TEMPERATURE AT EACH INCREASED PRESSURE FOR CAUSING CONDENSATION OF SOME OF THE IMPURITIES THAT DRAIN OFF EACH TIME TEMPERATURE IS DECREASED,
Claim 2
Independent Claim
68 words
A METHOD OF REMOVING IMPURITIES FROM A COMPRESSED GAS COMPRISING THE FOLLOWING STEPS IN THE ORDER NAMED, OF: (A) ALTERNATELY COMPRESSING AND COOLING THE GAS A PLURALITY OF TIMES TO PROGRESSIVELY INCREASE ITS PRESSURE EACH TIME THE GAS IS COMPRESSED AND TO ALTERNATELY INCREASE AND DECREASE ITS TEMPERATURE AT EACH INCREASED PRESSURE FOR CAUSING CONDENSATION OF SOME OF THE IMPURITIES THAT DRAIN OFF EACH TIME TEMPERATURE IS DECREASED,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |