US2580053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil containing copolymers of alpha-beta unsaturated dicarboxy esters with alpha-beta unsaturated monocarboxy acids
Assignee: Standard Oil Development Co
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Filing: 1949-08-30
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Granted: 1951-12-25
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Expires: 1969-08-30
Abstract
No abstract record available.
Inventors
- 👤 Tutwiler Thomas Stanford
- 👤 John C Munday
- 👤 Dilworth T Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:06
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A LUBRICATING OIL BASE STOCK AND CONTAINING FROM 0.01 TO 15% BY WEIGHT OF A COPOLYMER FORMED BY COPOLYMERIZING AN ALPHA-BETA UNSATURATED MONOCARBOXY ESTER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
35 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A LUBRICATING OIL BASE STOCK AND CONTAINING FROM 0.01 TO 15% BY WEIGHT OF A COPOLYMER FORMED BY COPOLYMERIZING AN ALPHA-BETA UNSATURATED MONOCARBOXY ESTER HAVING THE GENERAL FORMULA
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |