Patent US2562776A successfully refreshed from Google Patents.
US2562776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant additive
Assignee: Standard Oil Development Co
•
Filing: 1948-06-24
•
Granted: 1951-07-31
•
Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Cyphers
- 👤 Jeffrey H Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:28
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2225/00; C10M2225/02; C10N; C10N2040/00; C10N2040/08; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MINERAL BASE LUBRICATING OIL CONTAINING 0.02 TO 20%, BY WEIGHT, BASED ON THE TOTAL COMPOSITION, OF THE OIL SOLUBLE CONDENSATION PRODUCT OF A C6 TO C22 DIALKYLATED DITHIOPHOSPHATE SALT OF ALKALI METAL CONDENSED AT A TEMPERATURE OF ABOUT 100 TO 200* F. WITH A COPOLYMER OF C6 TO C22 ALIPHATIC CHLORMALEATE WITH VINYL ACETATE, SAID COPOLYMER BEING PRODUCED AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* TO 300* F. AND HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 1000 AND 25,000.
Claim 2
Dependent Claim
87 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MINERAL BASE LUBRICATING OIL CONTAINING 0.02 TO 20%, BY WEIGHT, BASED ON THE TOTAL COMPOSITION, OF THE OIL SOLUBLE CONDENSATION PRODUCT OF A C6 TO C22 DIALKYLATED DITHIOPHOSPHATE SALT OF ALKALI METAL CONDENSED AT A TEMPERATURE OF ABOUT 100 TO 200* F. WITH A COPOLYMER OF C6 TO C22 ALIPHATIC CHLORMALEATE WITH VINYL ACETATE, SAID COPOLYMER BEING PRODUCED AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* TO 300* F. AND HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 1000 AND 25,000.
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) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |