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US2937146A
Expired / Lapsed
US
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Antifreeze composition
Assignee: EIDP Inc
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Filing: 1956-11-21
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Granted: 1960-05-17
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Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Cutlip Claude Ross
- 👤 Scheer Richard David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A COLORED ANTIFREEZE SOLUTION CONTAINING A POLYHYDRIC ALCOHOL OF THE GROUP CONSISTING OF GLYCOLS AND GLYCEROL AS THE MAJOR CONSTITUENT AND A RESERVE ALKALIMITY FROM A CORROSION INHIBITOR CONTAINING AN ALKALI METAL META BORATE, WHICH SOLUTION IS CORROSIVE TO IRON AT A RATE OF NO MORE THAN 0.1 INCH PER YEAR, DURING USE AND OVER A PERIOD IN WHICH THE RESERVE ALKALINITY CHANGES FROM FULL RESERVE ALKALINITY TO ONE-QUARTER RESERVE ALKALINITY, A COLOR INDICATOR COMPRISING A PH SENSITIVE DYE THAT CHANGES THE COLOR OF THE ANTIFREEZE SOLUTION WHEN THE RESERVE ALK
Claim 2
Dependent Claim
92 words
IN A COLORED ANTIFREEZE SOLUTION CONTAINING A POLYHYDRIC ALCOHOL OF THE GROUP CONSISTING OF GLYCOLS AND GLYCEROL AS THE MAJOR CONSTITUENT AND A RESERVE ALKALIMITY FROM A CORROSION INHIBITOR CONTAINING AN ALKALI METAL META BORATE, WHICH SOLUTION IS CORROSIVE TO IRON AT A RATE OF NO MORE THAN 0.1 INCH PER YEAR, DURING USE AND OVER A PERIOD IN WHICH THE RESERVE ALKALINITY CHANGES FROM FULL RESERVE ALKALINITY TO ONE-QUARTER RESERVE ALKALINITY, A COLOR INDICATOR COMPRISING A PH SENSITIVE DYE THAT CHANGES THE COLOR OF THE ANTIFREEZE SOLUTION WHEN THE RESERVE ALK
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |