US2899411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane elastomers from hy-
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A POLYURETHANE ELASTOMER COMPRISING THE REACTION PRODUCT OF HEATING UNDER ESSENTIALLY ANHYDROUS CONDITIONS (1) A MIXTURE OF ONE MOL OF A HYDROXYL POLY(POLYMETHYLENE OXIDE) OF THE FORMULA HO((CH2)NO)IH WHEREIN N IS A NUMBER FROM 3 TO 6 AND X IS AN INTEGER GREATER THAN 7 HAVING A MOLECULAR WEIGHT OF FROM ABOUT 800 TO ABOUT 4,000 AND ABOUT FROM 0.5 TO 9.0 MOLS OF A SATURATED ALIPHATIC GLYCOL CONTAINING FROM 4 TO 12 CARBON ATOMS AND (2) FROM ABOUT 1.5 TO 10 MOLS OF A DIPHENYL DIISOCYANATE HAVING THE FORMULA
Claim 2
Dependent Claim
90 words
A POLYURETHANE ELASTOMER COMPRISING THE REACTION PRODUCT OF HEATING UNDER ESSENTIALLY ANHYDROUS CONDITIONS (1) A MIXTURE OF ONE MOL OF A HYDROXYL POLY(POLYMETHYLENE OXIDE) OF THE FORMULA HO((CH2)NO)IH WHEREIN N IS A NUMBER FROM 3 TO 6 AND X IS AN INTEGER GREATER THAN 7 HAVING A MOLECULAR WEIGHT OF FROM ABOUT 800 TO ABOUT 4,000 AND ABOUT FROM 0.5 TO 9.0 MOLS OF A SATURATED ALIPHATIC GLYCOL CONTAINING FROM 4 TO 12 CARBON ATOMS AND (2) FROM ABOUT 1.5 TO 10 MOLS OF A DIPHENYL DIISOCYANATE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |