US2846829A
Expired / Lapsed
US
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Method of making a thermally responsive element
Assignee: Dole Valve Co
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Filing: 1954-03-10
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Granted: 1958-08-12
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Expires: 1974-03-10
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Eskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:49
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/32; G01K5/44; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/49925; Y10T29/49934
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
154 words
A METHOD OF MAKING A THERMALLY RESPONSIVE ELEMENT WITH COMPRISES PROVIDING A VACUUM CHAMBER, CONFINING A PREDETERMINED AMOUNT OF METAL WOOL FABRIC WITHIN A CASING, PLACING AN OPEN ENDED CONTAINER ON SAID CASING IN COMMUNICATION WITH THE METAL WOOL FABRIC THEREIN AND SEALING THE CONTAINER THERETO, PLACING IN SAID CONTAINER IN JUXTAPOSED RELATION TO THE METAL WOOL FABRIC IN SAID CASING QUANTITY OF A SOLID ORGANIC CRYSTALLINE SUBSTANCE HAVING A FUSING POINT WITHIN A PREDETERMINED TEMPERATURE RANGE, SAID QUANTITY OF SOLID ORGANIC CRYSTALLINE SUBSTANCE COMPRISING FROM ABOUT 75 TO 40% BY WEIGHT OF THE THERMALLY RESPONSIVE ELEMENT TO BE PRODUCED, EVACUATING SAID VACUUM CHAMBER TO REDUCE THE PRESSURE THEREIN, MAINTAINING SAID VACUUM CHAMBER AT A REDUCED PRESSURE AND APPLYING HEAT THERETO TO CAUSE SAID ORGANIC CRYSTALLINE SUBSTANCE TO FUSE AND IMPREGNATE SAID COMPRESSIBLE FABRIC UNDER THE INFLUENCE OF GRAVITY, COOLING SAID CHAMBER AND RESTORING NORMAL AIR PRESSURE THEREIN, REMOVING ANY EXCESS ORGANIC CRYSTALLINE SUBSTANCE
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |