US3591532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density cellular polyurethane elastomer
Assignee: Pharmacia and Upjohn Co
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Filing: 1968-06-06
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Granted: 1971-07-06
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Expires: 1988-06-06
Abstract
Abstract CELLULAR POLYURETHANE ELASTOMERS OF HIGH DENSITY (ILLUSTRATIVELY FROM 10 TO 50 P.C.F.) ARE PREPARED FROM (1) METHYLENEBIS (PHENYL ISOCYANATE) OR MODIFIED FORMS THEREOF, INCLUDING MIXTURES OF POLYMETHYLENE POLYPHENYL ISOCYANATES CONTAINING METHYLENEBIS (PHENYL ISOCYANATE), AND (2) A POLYESTER DIOL, A POLYALKADIENE POLYOL HAVING A FUNCTIONALITY OF AT LEAST TWO OR A POLYETHER POLYOL (FUNCTIONALITY 2 TO 4) AND, OPTIONALLY, (3) A CURATIVE, USING CONVENTIONAL HIGH DENSITY FOAM PROCEDURES. THE NOVEL COMPOSITIONS CAN BE USED FOR A VARIETY OF PURPOSES INCLUDING SHOE SOLES, GASKETS, SHOCK AND SOUND ABSORBENT APPLICATIONS, AND THE LIKE.
Inventors
- 👤 Lawrence W Abercrombie
- 👤 Nabil N Saaty
- 👤 Adnan A R Sayigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/28; C08G18/65; C08G18/6505; C08G18/6576; C08G18/6582; C08G18/66; C08G18/6603; C08G2110/00; C08G2110/0008; C08G2110/0033; C08G2110/0041; C08G2110/0066; C08G2110/0083; C08G2350/00; C08G2410/00
Claims Analysis
Total Claims: 0
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |