Patent US2964477A successfully refreshed from Google Patents.
US2964477A
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Phosphate ester compositions
Assignee: Celanese Corp
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Filing: 1955-11-03
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Granted: 1960-12-13
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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 06:46
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
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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) | 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 |