Patent US4522762A successfully refreshed from Google Patents.
US4522762A
Expired / Lapsed
US
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Diisocyanate
Assignee: Dow Chemical Co
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Filing: 1982-11-10
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Granted: 1985-06-11
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Expires: 2002-11-10
Abstract
Abstract A novel aliphatic diisocyanate, namely 1,4-bis(2-isocyanatoethyl)cyclohexane, is disclosed. Polyurethanes derived from this diisocyanate exhibit advantageous properties. Illustratively, polyurethane elastomers prepared from the above diisocyanate, a polymeric diol and a low molecular weight diol extender, possess significantly improved resilience properties and are useful in the preparation of automobile bumpers, fenders and the like.
Inventors
- 👤 Richard W. Oertel, III
- 👤 Reinhard H. Richter
- 👤 Benjamin W. Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:02
CPC Classifications
C; C07; C07C; C07C255/00; C07C265/00; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
1,4-bis-(2-isocyanatoethyl)cyclohexane.
Claim 2
Dependent Claim
1 words
1,4-bis-(2-isocyanatoethyl)cyclohexane.
References Cited (Backward Citations)
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Cited
US3624122A
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US3515740A
Cited
US3584045A
Cited
US3625986A
Cited
US3787469A
Cited
US4113705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |