Patent US2582708A successfully refreshed from Google Patents.
US2582708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil additives
Assignee: Standard Oil Development Co
•
Filing: 1948-10-01
•
Granted: 1952-01-15
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Lippincott
- 👤 Alexander H Popkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:46
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C10M145/00; C10M145/02; C10M145/10; C10M149/00; C10M149/02; C10M149/04; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/22; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/101; C10M2213/00; C10M2213/04; C10M2213/06; C10M2217/00; C10M2217/02; C10M2217/022; C10M2221/00; C10M2221/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PRODUCT CONSISTING ESENTIALLY OF AN ESTERIFIED CONDENSATE OBTAINED BY SUBJECTING TO A TEMPERATURE OF ABOUT 40*-150* C., ABOUT 1 MOL OF A COMPUND SELECTED FROM THE CLASS CONSISTING OF ETHYLENE-1, 2-DICARBOXYLIC ACIDS, METHYLENE SUCCINIC ACIDS, AND THEIR ANHYDRIDES, AND ABOUT 1-4 MOLS OF BUTADIENE MONOXIDE WHEREIN THE ESTERFICATION AGENT IS SELECTED FROM THE CLASS CONSISTING OF MONOHYDRIC PRIMARY SUBSTANTIALLY STRAIGHT CHAIN ALCOHOLS, CONTAINING FROM 8-24 CARBON ATOMS.
Claim 2
Dependent Claim
68 words
A PRODUCT CONSISTING ESENTIALLY OF AN ESTERIFIED CONDENSATE OBTAINED BY SUBJECTING TO A TEMPERATURE OF ABOUT 40*-150* C., ABOUT 1 MOL OF A COMPUND SELECTED FROM THE CLASS CONSISTING OF ETHYLENE-1, 2-DICARBOXYLIC ACIDS, METHYLENE SUCCINIC ACIDS, AND THEIR ANHYDRIDES, AND ABOUT 1-4 MOLS OF BUTADIENE MONOXIDE WHEREIN THE ESTERFICATION AGENT IS SELECTED FROM THE CLASS CONSISTING OF MONOHYDRIC PRIMARY SUBSTANTIALLY STRAIGHT CHAIN ALCOHOLS, CONTAINING FROM 8-24 CARBON ATOMS.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |