Patent US2744071A successfully refreshed from Google Patents.
US2744071A
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Lubricating oil additives
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-02-27
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Granted: 1956-05-01
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Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Hollyday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:26
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/02; B; B01; B01J; B01J8/00; B01J8/02; B01J8/0285; C; C07; C07C; C07C1/00; C07C1/02; C07C209/00; C07C209/60; C07C29/00; C07C29/15; C07C29/151; C07C29/152; C07C29/153; C07C29/156; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238; C10L1/2381; C10M; C10M1/00; C10M1/08; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A LUBRICATING OIL COMPOSITION HAVING OUTSTANDING LOW TEMPERATURE PROPERTIES WHICH COMPRISES A MAJOR PORTION OF A MINERAL LUBRICATING OIL AND A POUR POINT DEPRESSING AMOUNT OF A POLYAMIDE, OF SUFFICIENT MOLECULAR WEIGHT TO BE OIL SOLUBLE, OF SUBSTANTIALLY EQUIMOLECULAR AMOUNTS OF AN AMINE CONSTITUENT, SELECTED FROM THE GROUP CONSISTING OF DIAMINES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
55 words
A LUBRICATING OIL COMPOSITION HAVING OUTSTANDING LOW TEMPERATURE PROPERTIES WHICH COMPRISES A MAJOR PORTION OF A MINERAL LUBRICATING OIL AND A POUR POINT DEPRESSING AMOUNT OF A POLYAMIDE, OF SUFFICIENT MOLECULAR WEIGHT TO BE OIL SOLUBLE, OF SUBSTANTIALLY EQUIMOLECULAR AMOUNTS OF AN AMINE CONSTITUENT, SELECTED FROM THE GROUP CONSISTING OF DIAMINES 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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |