US2998388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer
Assignee: Pennwalt Corp
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Filing: 1956-12-19
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Granted: 1961-08-29
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Expires: 1976-12-19
Abstract
No abstract record available.
Inventors
- 👤 Jr William A La Lande
- 👤 John F Gall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:14
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A HEAT TRANSFER COMPOSITION COMPRISING FROM 1 TO 99 PARTS BY WEIGHT OF PERCHLORYL FLUORIDE AND FROM 99 TO 1 PART BY WEIGHT OF A HIGHLY HALOGENATED HYDROVARBON SELECTED FROM THE GROUP CONSISTING OF TRICHLOROMONOFLUOROMETHANE, DICHLORODIFLUOROMETHANE, MONOCHLOROTRIFLUOROMETHANE, TETRAFLUOROETHANE, DICHLOROMONOFLUOROMETHANE, MONOCHLORODIFLUOROMETHANE, 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE, 1,2-DICHLORO-1,1,2,2-TETRAFLUOROETHANE, AND 1CHLORO-1,1,2,2,2-PENTAFLUOROETHANE.
Claim 2
Dependent Claim
44 words
A HEAT TRANSFER COMPOSITION COMPRISING FROM 1 TO 99 PARTS BY WEIGHT OF PERCHLORYL FLUORIDE AND FROM 99 TO 1 PART BY WEIGHT OF A HIGHLY HALOGENATED HYDROVARBON SELECTED FROM THE GROUP CONSISTING OF TRICHLOROMONOFLUOROMETHANE, DICHLORODIFLUOROMETHANE, MONOCHLOROTRIFLUOROMETHANE, TETRAFLUOROETHANE, DICHLOROMONOFLUOROMETHANE, MONOCHLORODIFLUOROMETHANE, 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE, 1,2-DICHLORO-1,1,2,2-TETRAFLUOROETHANE, AND 1CHLORO-1,1,2,2,2-PENTAFLUOROETHANE.
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |