Patent US2628974A successfully refreshed from Google Patents.
US2628974A
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US
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Polyester synthetic lubricants
Assignee: Texaco Inc
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Filing: 1948-03-27
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Granted: 1953-02-17
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Expires: 1968-03-27
Abstract
No abstract record available.
Inventors
- 👤 Robert T Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/30; C10M2207/302; C10M2207/304; C10M2209/00; C10M2209/10; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2221/00; C10M2221/04; C10M2221/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SYNTHETIC LUBRICANT CONSISTING ESSENTIALLY OF A POLYESTER FORMED BY THE REACTION OF AN ALIPHATIC DIBASIC ACID CONTAINING 6 TO 20 CARBON ATOMS WITH A GLYCOL OF THE GROUP CONSISTING OF ETHYLENE GLYCOL, PROPYLENE GLYCOL, BUTYLENE GLYCOL DIETHYLENE GLYCOL AND DIPROPYLENE GLYCOL AND A MONOFUNCTIONAL COMPOUND CONTAINING 4 TO 20 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONOHYDROXY ALCOHOLS AND ALIPHATIC MONOCARBOXYLIC ACIDS, THE MOL RATIO OF DIFUNCTIONAL COMPOUNDS IN THE REACTION MIXTURE BEING BETWEEN 1.25 AND 2.0
Claim 2
Dependent Claim
81 words
A SYNTHETIC LUBRICANT CONSISTING ESSENTIALLY OF A POLYESTER FORMED BY THE REACTION OF AN ALIPHATIC DIBASIC ACID CONTAINING 6 TO 20 CARBON ATOMS WITH A GLYCOL OF THE GROUP CONSISTING OF ETHYLENE GLYCOL, PROPYLENE GLYCOL, BUTYLENE GLYCOL DIETHYLENE GLYCOL AND DIPROPYLENE GLYCOL AND A MONOFUNCTIONAL COMPOUND CONTAINING 4 TO 20 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONOHYDROXY ALCOHOLS AND ALIPHATIC MONOCARBOXYLIC ACIDS, THE MOL RATIO OF DIFUNCTIONAL COMPOUNDS IN THE REACTION MIXTURE BEING BETWEEN 1.25 AND 2.0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |