US2964477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate ester compositions
Assignee: Celanese Corp
•
Filing: 1955-11-03
•
Granted: 1960-12-13
•
Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Howard L Pilat
- 👤 Schrage Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:05
CPC Classifications
C; C10; C10M; C10M3/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2225/00; C10M2225/02; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
AN ORGANIC PHOSPHATE ESTER FUNCTIONAL FLUID CONTAINING BETWEEN 0.5 AND 15% BY WEIGHT OF A LINEAR POLYESTER OF (A) A DI-(HYDROXYARYL)-ALKYLIDENE AND (B) A MEMBER OF THE GROUP CONSISTING OF PHOSPHONIC ACIDS AND MONOESTERS OF PHOSPHORIC ACID, SAID LINEAR POLYESTER CONTAINING AT LEAST SIX RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
50 words
AN ORGANIC PHOSPHATE ESTER FUNCTIONAL FLUID CONTAINING BETWEEN 0.5 AND 15% BY WEIGHT OF A LINEAR POLYESTER OF (A) A DI-(HYDROXYARYL)-ALKYLIDENE AND (B) A MEMBER OF THE GROUP CONSISTING OF PHOSPHONIC ACIDS AND MONOESTERS OF PHOSPHORIC ACID, SAID LINEAR POLYESTER CONTAINING AT LEAST SIX RECURRING STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
US2058394A
Cited
US2133311A
Cited
US2435252A
Cited
US2512582A
Cited
US2572076A
Cited
US2566623A
Cited
US2549270A
Cited
US2674590A
Cited
US2596141A
Cited
US2636861A
Cited
US2612488A
Cited
US2716101A
Cited
US2743258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |