US2866774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether polyurethane rubber
Assignee: University of Notre Dame
•
Filing: 1953-09-23
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Granted: 1958-12-30
•
Expires: 1973-09-23
Abstract
No abstract record available.
Inventors
- 👤 Charles C Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08G18/4833; C08G18/4837; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS OF FORMING A POLYURETHANE RECTION PRODUCT COMPRISING THE STEPS OF MIXING IN A LIQUID FORM (1) A HYDROXY TERMINATED POLYETHER GLYCOL POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 600 WHICH IS A CONDENSATION PRODUCT OF AN ALKYLENE OXIDE HAVING FROM 2 TO 4 CARBON ATOMS AND ABOUT .01 TO 10 MOL. PERCENT BASED ON THE ALKYLENE OXIDE OF A POLYHYDRIC ALOCHOL HAVING LESS THAN 7 CARBON ATOMS AND HAVING 3 TO 6 PRIMARY HYDROXYL GROUPS, AT LEAST 20 PERCENT OF SAID ALKYLENE OXIDE HAVING MORE THAN 2 CARBON ATOMS, AND (2) AT LEAST ABOUT AN EQUAL MOLAR AMOUNT OF AN ORGANIC DIISOCYANATE BASED ON SAID POLYETHER GLYCOL, AND REACTING THE MIXTURE UNTIL A SECOND POLYMER HAVING A CHAIN LENGTH SUBSTANTIALLY GREATER THAN THAT OF SAID POLYETHER GLYCOL POLYMER IS FORMED.
Claim 2
Dependent Claim
133 words
A PROCESS OF FORMING A POLYURETHANE RECTION PRODUCT COMPRISING THE STEPS OF MIXING IN A LIQUID FORM (1) A HYDROXY TERMINATED POLYETHER GLYCOL POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST 600 WHICH IS A CONDENSATION PRODUCT OF AN ALKYLENE OXIDE HAVING FROM 2 TO 4 CARBON ATOMS AND ABOUT .01 TO 10 MOL. PERCENT BASED ON THE ALKYLENE OXIDE OF A POLYHYDRIC ALOCHOL HAVING LESS THAN 7 CARBON ATOMS AND HAVING 3 TO 6 PRIMARY HYDROXYL GROUPS, AT LEAST 20 PERCENT OF SAID ALKYLENE OXIDE HAVING MORE THAN 2 CARBON ATOMS, AND (2) AT LEAST ABOUT AN EQUAL MOLAR AMOUNT OF AN ORGANIC DIISOCYANATE BASED ON SAID POLYETHER GLYCOL, AND REACTING THE MIXTURE UNTIL A SECOND POLYMER HAVING A CHAIN LENGTH SUBSTANTIALLY GREATER THAN THAT OF SAID POLYETHER GLYCOL POLYMER IS FORMED.
References Cited (Backward Citations)
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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) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |