US2817636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent type antifreeze composition
Assignee: Gulf Research and Development Co
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Filing: 1954-10-04
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Granted: 1957-12-24
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert C Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:53
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PERMANENT TYPE ANTIFREEZE COMPOSITION CONSISTING ESSENTIALLY OF A SATURATED DIHDROXY ALIPHATIC ALCOHOL OF LOW MOLECULAR WEIGHT CONTAINING APPROXIMATELY .2 TO .8 PERCENT BY WEIGHT OF AN ALKALI MATAL NITRITE, APPROXIMATELY 2 TO 1.0 PERCENT OF TRIETHANOLAMINE, APPROXIMATELY .1 TO .5 PERCENT OF AN ALKALI METAL 2 ETHYLHEXYL-3-METHYLBUTYLORTHOPHOSPHATE AND APPROXIMATELY 905 TO .15 PERCENT OF AN ALKALI METAL MERCAPTOBENZOTHIAZOL.
Claim 2
Dependent Claim
59 words
A PERMANENT TYPE ANTIFREEZE COMPOSITION CONSISTING ESSENTIALLY OF A SATURATED DIHDROXY ALIPHATIC ALCOHOL OF LOW MOLECULAR WEIGHT CONTAINING APPROXIMATELY .2 TO .8 PERCENT BY WEIGHT OF AN ALKALI MATAL NITRITE, APPROXIMATELY 2 TO 1.0 PERCENT OF TRIETHANOLAMINE, APPROXIMATELY .1 TO .5 PERCENT OF AN ALKALI METAL 2 ETHYLHEXYL-3-METHYLBUTYLORTHOPHOSPHATE AND APPROXIMATELY 905 TO .15 PERCENT OF AN ALKALI METAL MERCAPTOBENZOTHIAZOL.
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |