US4510097A
Expired / Lapsed
US
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Hindered aliphatic monoisocyanates
Assignee: Hampshire Chemical Corp
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Filing: 1978-11-20
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Granted: 1985-04-09
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Expires: 1998-11-20
Abstract
Abstract This invention relates to novel hindered cycloaliphatic monoisocyanates of the general formula: ##STR1## wherein R 1 -R 7 are members of the group consisting of H, alkyl, cycloalkyl, aryl, alkaryl, aralkyl or mixtures thereof wherein the alkyl groups contain 1-18 carbon atoms, the cycloalkyl groups contain 4-8 carbon atoms and the aryl groups contain 6-14 carbon atoms with the proviso that where R 3 is a group member other than H, R 1 , R 2 , R 4 and R 5 can be H and with the further proviso that where R 3 is H at least two of R 1 , R 2 , R 4 and R 5 are group members other than H and x is 1 to 7. Other novel dihindered intermediate compositions include aliphatic monoamines.
Inventors
- 👤 Clifton L. Kehr
- 👤 Walter R. Wszolek
- 👤 Nelson S. Marans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/14; C08G18/70; C08G18/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
2,6-diethylcyclohexylisocyanate.
Claim 2
Dependent Claim
1 words
2,6-diethylcyclohexylisocyanate.
References Cited (Backward Citations)
US3873540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |