US2909559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric phosphate esters and their production
Assignee: Union Carbide Corp
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Filing: 1958-02-03
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Granted: 1959-10-20
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:22
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
AS NEW PRODUCTS, CONDENSED POLYPHOSPHATE ESTERS PRODUCED BY A PROCESS COMPRISING HEATING AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 90*C. TO ABOUT 250* C. AN HYDROXYL-CONTAINING PHOSPHATE ESTER HAVING THE STRUCTURE
Claim 2
Dependent Claim
32 words
AS NEW PRODUCTS, CONDENSED POLYPHOSPHATE ESTERS PRODUCED BY A PROCESS COMPRISING HEATING AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 90*C. TO ABOUT 250* C. AN HYDROXYL-CONTAINING PHOSPHATE ESTER HAVING THE STRUCTURE
Claim 3
Dependent Claim
28 words
PROCESS FOR PRODUCING CONDENSED POLYPHOSPHATE ESTERS, WHICH COMPRISES HEATING AT A TEMPERATURE WITHIN THE RANGE FROM AROUND 90*C. TO AROUND 250*C. AN HYDROXYL-CONTAINING PHOSPHATE ESTER HAVING THE STRUCTURE
Claim 4
Dependent Claim
28 words
PROCESS FOR PRODUCING CONDENSED POLYPHOSPHATE ESTERS, WHICH COMPRISES HEATING AT A TEMPERATURE WITHIN THE RANGE FROM AROUND 90*C. TO AROUND 250*C. AN HYDROXYL-CONTAINING PHOSPHATE ESTER HAVING THE STRUCTURE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |