US2686204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyketones
Assignee: Standard Oil Co
•
Filing: 1949-06-03
•
Granted: 1954-08-10
•
Expires: 1969-06-03
Abstract
No abstract record available.
Inventors
- 👤 Roger W Watson
- 👤 Lawson W Wixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A PROCESS FOR PRODUCING POLYKETONES WHICH CONSISTS ESSENTIALLY IN DECARBOXLATING AND KETONIZING, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 250* F. TO ABOUT 800* F., A MIXTURE COMPRISING AT LEAST ONE INITIALLY ADDED COMPOUND HAVING THE GENERAL FORMULA RCOOZ AND AT LEAST ONE COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
50 words
A PROCESS FOR PRODUCING POLYKETONES WHICH CONSISTS ESSENTIALLY IN DECARBOXLATING AND KETONIZING, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 250* F. TO ABOUT 800* F., A MIXTURE COMPRISING AT LEAST ONE INITIALLY ADDED COMPOUND HAVING THE GENERAL FORMULA RCOOZ AND AT LEAST ONE COMPOUND HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
70 words
A PROCESS FOR THE PREPARATING OF POLYKETONES WHICH COMPRISES REACTING AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 250* F. TO ABOUT 800* F., A MIXTURE CONTAINING AT LEAST ONE INITIALLY ADDED ALKYL MONOCARBOXYLIC ACID AND AT LEAST ONE ALPHA, OMEGA POLYMETHYLENE DICARBOXYLIC ACID IN THE PRESENCE OF A KETONIZING DECARBOXYLATION CATALYST AND RECOVERING A REACTION PRODUCT MELTING IN THE RANGE FROM ABOUT 120* F. TO ABOUT 300* F.
Claim 4
Dependent Claim
70 words
A PROCESS FOR THE PREPARATING OF POLYKETONES WHICH COMPRISES REACTING AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 250* F. TO ABOUT 800* F., A MIXTURE CONTAINING AT LEAST ONE INITIALLY ADDED ALKYL MONOCARBOXYLIC ACID AND AT LEAST ONE ALPHA, OMEGA POLYMETHYLENE DICARBOXYLIC ACID IN THE PRESENCE OF A KETONIZING DECARBOXYLATION CATALYST AND RECOVERING A REACTION PRODUCT MELTING IN THE RANGE FROM ABOUT 120* F. TO ABOUT 300* F.
References Cited (Backward Citations)
US1988021A
Cited
US1941640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |