US3839384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether urethane foam
Assignee: Union Carbide Corp
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Filing: 1972-11-13
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Granted: 1974-10-01
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Expires: 1992-11-13
Abstract
Abstract WHAT IS CLAIMED IS: 1. AN ARALKYL MODIFIED SILOXANE OIL HAVING THE AVERAGE FORMULA (X)2R3-ZSIO(R2SIO)X((X)(R)SIO)YSIR3-ZXZ WHEREIN X HAS A VALUE OF 2 TO 8 INCLUSIVE; Y HAS A VALUE OF 0 TO 6 INCLUSIVE; Z HAS A VALUE OF 0 TO 1 INCLUSIVE; R IS A LOWER ALKYL OR PHENYL RADICAL; AND X IS AN ARALKYL RADICAL OF THE FORMULA -CNH2N-C6H5 WHRE A HAS A VALUE OF 2 OR 3; SAID SILOXANE CONTAINING AT LAST ONE OF SAID ARALKYL RADICALS AND HAVING A VISCOSITY IN THE RANGE OF ABOUT 4 TO ABOUT 40 CENTISTOKES AT 25* C.
Inventors
- 👤 E Morehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:16
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0042; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874; C08G; C08G77/00; C08G77/04; C08G77/045; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AN ARALKYL MODIFIED SILOXANE OIL HAVING THE AVERAGE FORMULA
Claim 2
Dependent Claim
9 words
AN ARALKYL MODIFIED SILOXANE OIL HAVING THE AVERAGE FORMULA
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |