Patent US3878235A successfully refreshed from Google Patents.
US3878235A
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Chlorine containing methylene bridged diaryl diisocyanates
Assignee: Olin Corp
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Filing: 1973-11-15
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Granted: 1975-04-15
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Expires: 1993-11-15
Abstract
Abstract Selected chlorine-containing methylene-bridged diaryl diisocyanates are disclosed which are useful in the production of cellular and non-cellular polyurethanes.
Inventors
- 👤 Wilhelm J Schnabel
- 👤 Maurice C Raes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/14; C07C263/00; C07C263/16; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/773; C08G2101/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
A CHLORINE-CONTAINING, METHYLENE-BRIDGED DIARYL DIISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ORTHOCHLOROBENZYL-TOLUENE DIISOCYANATE AND DICHLOROBENZYLTOLUENE DIISOCYANATE.
Claim 2
Dependent Claim
16 words
A CHLORINE-CONTAINING, METHYLENE-BRIDGED DIARYL DIISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ORTHOCHLOROBENZYL-TOLUENE DIISOCYANATE AND DICHLOROBENZYLTOLUENE DIISOCYANATE.
Claim 3
Dependent Claim
11 words
A diisocyanate as claimed in claim 1 identified as ortho-chlorobenzyl-toluene diisocyanate.
References Cited (Backward Citations)
US3255226A
Cited
US3281447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |