US2863855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making polyester composition
Assignee: Hudson Foam Plastics Corp
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Filing: 1955-07-25
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Granted: 1958-12-09
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Christopher L Wilson
- 👤 Calvin J Benning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/42; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4291; C08G63/52; C08G63/56; C08G63/58; C08G63/66; C08G63/668; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A METHOD WHICH COMPRISES REACTING A LIQUID POLYESTER HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 AND AN ACID NUMBER SUBSTANTIALLY ABOVE 10 AND NOT SUBSTANTIALLY ABOVE 100, SAID POLYESTER BEING PREDOMINANTLY THE PRODUCT OF ESTERIFICATION REACTION BETWEEN AN ORGANIC DICARBOXYLIC ACID AND A GLYCOL, WITH AN ALKYLENE OXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, BUTYLENE CYCLOHEXENE, STYRENE AND HYDROXY METHYLETHYLENE OXIDES IN AN AMOUNT RANGING FROM ABOUT 80% TO ABOUT 230% OF THE THEORETICAL STOICHIOMETRIC AMOUNT FOR COMPLETELY REACTING WITH THE CARBOXYL GROUPS OF SAID POLYESTER AND AT A TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 275*C., THEREBY EFFECTING ESTERIFICATION OF THE CARBOXYL GROUPS WITH FORMATION OF HYDROXYALKYL ESTER GROUPS, AND CONTINUING SAID REACTION UNTIL THE ACID NUMBER OF THE POLYESTER IS REDUCED SUBSTANTIALLY BELOW 10, THE SAID REACTION BEING DISCONTINUED WHILE LIMITED SUBSTANTIALLY TO SAID ESTERIFICATION.
Claim 2
Independent Claim
139 words
A METHOD WHICH COMPRISES REACTING A LIQUID POLYESTER HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 AND AN ACID NUMBER SUBSTANTIALLY ABOVE 10 AND NOT SUBSTANTIALLY ABOVE 100, SAID POLYESTER BEING PREDOMINANTLY THE PRODUCT OF ESTERIFICATION REACTION BETWEEN AN ORGANIC DICARBOXYLIC ACID AND A GLYCOL, WITH AN ALKYLENE OXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, BUTYLENE CYCLOHEXENE, STYRENE AND HYDROXY METHYLETHYLENE OXIDES IN AN AMOUNT RANGING FROM ABOUT 80% TO ABOUT 230% OF THE THEORETICAL STOICHIOMETRIC AMOUNT FOR COMPLETELY REACTING WITH THE CARBOXYL GROUPS OF SAID POLYESTER AND AT A TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 275*C., THEREBY EFFECTING ESTERIFICATION OF THE CARBOXYL GROUPS WITH FORMATION OF HYDROXYALKYL ESTER GROUPS, AND CONTINUING SAID REACTION UNTIL THE ACID NUMBER OF THE POLYESTER IS REDUCED SUBSTANTIALLY BELOW 10, THE SAID REACTION BEING DISCONTINUED WHILE LIMITED SUBSTANTIALLY TO SAID ESTERIFICATION.
References Cited (Backward Citations)
US1845198A
Cited
US1883182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |