Patent US2943986A successfully refreshed from Google Patents.
US2943986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation of radiation emitting apparatus
Assignee: Shell USA Inc
•
Filing: 1957-09-16
•
Granted: 1960-07-05
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Roy E Thorpe
- 👤 Alan C Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:40
CPC Classifications
G; G21; G21C; G21C5/00; G21C5/12; G21C5/123; G21D; G21D9/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S204/00; Y10S204/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE OPERATION OF RADIANT ENERGY-EMITTING EQUIPMENT, WHEREIN AN OPERATING FLUID THEREFOR IS SUBJECTED TO RADIATION, THE STEPS COMPRISING UTILIZING AS THE OPERATING FLUID A FLUID COMPOSITION COMPRISING AT LEAST 30% BY WEIGHT OF CIS-TRANS ISOMERIC SATURATED CYCLIC HYDROCARBONS, ANY BALANCE OF THE COMPOSITION BEING OTHER HYDROCARBONS, NO MORE THAN 20% BY WEIGHT OF THE COMPOSITION BEING AROMATIC AND OLEFINIC HYDROCARBONS, SUBJECTING SAID FLUID TO THE RADIATION, WHEREBY THE RATIO OF CISISOMERS TO TRANS-ISOMERS IS INCREASED, SUBJECTING THE MISTURE SO FORMED TO ISOMERIZATIN WHEREBY THE CIS TO TRANS RATIO IS SUBSTANTIALLY DECREASED, AND RECYCLING THE RESULTING PRODUCT FOR USE AS AN OPERATING FLUID IN RADIATIONEMITTING EQUIPMENT.
Claim 2
Dependent Claim
106 words
IN THE OPERATION OF RADIANT ENERGY-EMITTING EQUIPMENT, WHEREIN AN OPERATING FLUID THEREFOR IS SUBJECTED TO RADIATION, THE STEPS COMPRISING UTILIZING AS THE OPERATING FLUID A FLUID COMPOSITION COMPRISING AT LEAST 30% BY WEIGHT OF CIS-TRANS ISOMERIC SATURATED CYCLIC HYDROCARBONS, ANY BALANCE OF THE COMPOSITION BEING OTHER HYDROCARBONS, NO MORE THAN 20% BY WEIGHT OF THE COMPOSITION BEING AROMATIC AND OLEFINIC HYDROCARBONS, SUBJECTING SAID FLUID TO THE RADIATION, WHEREBY THE RATIO OF CISISOMERS TO TRANS-ISOMERS IS INCREASED, SUBJECTING THE MISTURE SO FORMED TO ISOMERIZATIN WHEREBY THE CIS TO TRANS RATIO IS SUBSTANTIALLY DECREASED, AND RECYCLING THE RESULTING PRODUCT FOR USE AS AN OPERATING FLUID IN RADIATIONEMITTING EQUIPMENT.
References Cited (Backward Citations)
US2708656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |