US3350316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifreeze composition
Assignee: Citgo Petroleum Corp
•
Filing: 1965-04-06
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Granted: 1967-10-31
•
Expires: 1985-04-06
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Berger
- 👤 Paul M Kerschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:39
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A NON-VOLATILE ANTIFREEZE COMPOSITION CONSISTING ESSENTIALLY OF: (A) THEYLENE GLYCOL IN THE AMOUNT OF FROM ABOUT 90% TO ABOUT 99% BY WEIGHT; (B) WATER IN THE AMOUNT OF FROM ABOUT 1% TO ABOUTR 10% BY WEIGHT OF THE COMPOSITION; (C) AN ALKALI METAL MERCAPTOBENZOTHIAZOLE IN THE AMOUNT OF FROM ABOUT 0.1% TO ABOUT 1.0% BY WEIGHT OF THE COMPOSITION; AND (D) BETWEENT ABOUT 1% AND ABOUT 5% OF A REACTION PRODUCT OF THE PROCESS COMPRISING THE STEPS OF: (1) PROVIDING PHOSPHORIC ACID, BORIC ACID, AND ALKANOL AMINES HAVING THE FORMULA
References Cited (Backward Citations)
US3046230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |