US2692860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifreeze compositions
Assignee: Gulf Research and Development Co
•
Filing: 1950-10-20
•
Granted: 1954-10-26
•
Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:01
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PERMANENT TYPE ANTIFREEZE COMPOSITION CONSISTING ESSENTIALLY OF ETHYLENE GLYCOL, ABOUT 0.5 PER CENT BY WEIGHT OF SODIUM NITRITE, ABOUT 0.2 PER CENT BY WEIGHT OF A 50 PER CENT AQUEOUS SOLUTION OF SODIUM MERCAPTOBENZOTHIAZOLE, AND ABOUT 1.0 PER CENT BY WEIGHT OF CYCLOHEXYLAMINE.
Claim 2
Dependent Claim
44 words
A PERMANENT TYPE ANTIFREEZE COMPOSITION CONSISTING ESSENTIALLY OF ETHYLENE GLYCOL, ABOUT 0.5 PER CENT BY WEIGHT OF SODIUM NITRITE, ABOUT 0.2 PER CENT BY WEIGHT OF A 50 PER CENT AQUEOUS SOLUTION OF SODIUM MERCAPTOBENZOTHIAZOLE, AND ABOUT 1.0 PER CENT BY WEIGHT OF CYCLOHEXYLAMINE.
References Cited (Backward Citations)
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US2054282A
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US2060138A
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US2147149A
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US2087103A
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US2164565A
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US2373570A
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US2467177A
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US2462694A
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US2558030A
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US2524484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |