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Patent US3853638A successfully refreshed from Google Patents.
US3853638A
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Quenching oil composition
Assignee: Shell USA Inc
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Filing: 1973-06-25
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Granted: 1974-12-10
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Expires: 1993-06-25
Abstract
Abstract A quenching oil composition with an improved rate of cooling for the quenching of ferrous metals comprises a major portion of a hydrocarbon mineral oil containing a minor proportion of a vicdihydrocarbyl substituted thiazole having in its 2-position a mercapto group.
Inventors
- 👤 D Wilpers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:10
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/56; C21D1/58; C10; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2040/00; C10N2040/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A QUENCHING OIL CMPOSITION CONSISTING ESSENTIALLY OF A MINERAL OIL, HAVING A VISCOSITY OF FROM ABOUT 15 TO ABOUT 200 SUS AT 100*F AND AN AROMATIC CONTENT OF FROM 8 TO 60 PERCENT AND FROM ABOUT 0.01 TO ABOUT 0.03 PERCENT BY WEIGHT OF A VICINAL DEHYDROCARBYL-SUBSTITUTED 2-MERCAPTOTHIAZOLE, EACH HYDROCARBYL SUBSTITUENT HAVING FROM ONE TO SIX CARBON ATOMS.
Claim 2
Dependent Claim
58 words
A QUENCHING OIL CMPOSITION CONSISTING ESSENTIALLY OF A MINERAL OIL, HAVING A VISCOSITY OF FROM ABOUT 15 TO ABOUT 200 SUS AT 100*F AND AN AROMATIC CONTENT OF FROM 8 TO 60 PERCENT AND FROM ABOUT 0.01 TO ABOUT 0.03 PERCENT BY WEIGHT OF A VICINAL DEHYDROCARBYL-SUBSTITUTED 2-MERCAPTOTHIAZOLE, EACH HYDROCARBYL SUBSTITUENT HAVING FROM ONE TO SIX CARBON ATOMS.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said dihydrocarbyl is dialkyl.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein said vicinal dihydrocarbyl substituent is joined to form a divalent hydrocarbylene moiety of four to six carbon atoms.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein the viscosity of the mineral oil is from about 40 to about 100 SUS at 100*F.
Claim 6
Dependent Claim
14 words
The composition of claim 2 wherein dialkyl is dimethyl and the 2-mercaptothizole is 2-mercapto-4,5-dimethylthiazole.
Claim 7
Dependent Claim
16 words
The composition of claim 3 wherein the hydrocarbon moiety is butadienylene and the 2-mercaptothiazole is 2-mercaptobenzothiazole.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |