Patent US2490029A successfully refreshed from Google Patents.
Patent US3261782A successfully refreshed from Google Patents.
US3261782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylbutyrolactone-alpha-acetic acids
Assignee: Chevron USA Inc
•
Filing: 1964-03-05
•
Granted: 1966-07-19
•
Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 Donald J Anderson
- 👤 Vries Louis De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:47
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C10; C10M; C10M129/00; C10M129/02; C10M129/26; C10M133/00; C10M133/02; C10M133/38; C10M133/44; C10M133/46; C10M133/52; C10M133/56; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2203/10; C10M2203/104; C10M2203/106; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/124; C10M2207/125; C10M2207/128; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISOCITY, AND FROM 0.1% TO 10% BY WEIGHT OF AN ALKYLBUTYROLACTONE-AACETIC ACID OF THE FORMULA
Claim 2
Dependent Claim
28 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISOCITY, AND FROM 0.1% TO 10% BY WEIGHT OF AN ALKYLBUTYROLACTONE-AACETIC ACID OF THE FORMULA
References Cited (Backward Citations)
US2839538A
Cited
US3155685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |