Patent US3769220A successfully refreshed from Google Patents.
US3769220A
Expired / Lapsed
US
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Antifreeze composition
Assignee: Texaco Inc
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Filing: 1970-11-23
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Granted: 1973-10-30
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Expires: 1990-11-23
Abstract
Abstract THE INVENTION IS A COMBINATION OF INHIBITORS WHICH EFFECIVELY PREVENTS CORROSION IN AUTOMOTIVE COOLING SYSTEMS CONTAINING ANTIFREEZE SOLUTION BASED ON WATERSOLUBLE ALCOHOLS. THE COMBINATION INCLUDES DISODIUM PHOSPHATE, DIPOTASSIUM PHOSPHATE, SODIUM METABORATE, POTASSIUM METABORATE, SODIUM TETRABORATE, AND SODIUM MERCAPTOBENZOTHIAZOLE.
Inventors
- 👤 J Willard
- 👤 R Matson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |