Patent US3293181A successfully refreshed from Google Patents.
US3293181A
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Dialkyl dithiophosphates and lubricants containing them
Assignee: Chevron USA Inc
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Filing: 1965-10-15
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Granted: 1966-12-20
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Frank A Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:18
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2633; C10L1/265
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
ZINC SALTS OF MIXED DIALKYL DITHIOPHOSPHORIC ACIDS IN WHICH THE ALKYL GROUPS ARE DERIVED FROM A MIXTURE OF ISOBUTANOL AND A BRANCHED CHAIN PRIMARY HEXYL ALCHOL, THE MOLE RATIO OF ISOBUTANOL TO HEXY ALCOHOL BEING WITHIN THE RANGE OF 0.1: TO 8:1.
Claim 2
Dependent Claim
42 words
ZINC SALTS OF MIXED DIALKYL DITHIOPHOSPHORIC ACIDS IN WHICH THE ALKYL GROUPS ARE DERIVED FROM A MIXTURE OF ISOBUTANOL AND A BRANCHED CHAIN PRIMARY HEXYL ALCHOL, THE MOLE RATIO OF ISOBUTANOL TO HEXY ALCOHOL BEING WITHIN THE RANGE OF 0.1: TO 8:1.
Claim 3
Dependent Claim
32 words
A LUBRICANT COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND A MINOR PROPORTION SUFFICIENT TO INHIBIT OXIDATION AND CORROSION OF THE ZINC SALT OF CLAIM 1.
References Cited (Backward Citations)
US2689220A
Cited
US3000822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |