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Patent US3284479A successfully refreshed from Google Patents.
US3284479A
Expired / Lapsed
US
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Organic polyisocyanates
Assignee: Bayer AG
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Filing: 1963-11-26
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Granted: 1966-11-08
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Expires: 1983-11-26
Abstract
No abstract record available.
Inventors
- 👤 Windemuth Erwin
- 👤 Bayer Otto
- 👤 Hennig Hans Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:43
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C273/1863; C07C273/1872; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AS A COMPOSITION OF MATTER, A CABAMYL BIURET POLYISOCYANATE HAVING THE FORMULA OCN-R-(N(-X)-CO-N(-X)-CO-N(-X)-R)N-NCO WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND -CO-NX-R-NCO AND AT LEAST ONE OF SAID GROUP MEMBER IS -CO-NX-R-NCO, R IS A DIVALENT ORGANIC RADICAL OBTAINED BY REMOVING THE -NCO GROUPS FROM AN ORGANIC DIISOCYANATE SELECTED FROM THE GROUP CONSISTING OF TETRAMETHYLENE DIISOCYANATE, HEXAMETHYLENE DIISOCYANATE, DICYCLOHEXYLMETHANE-4,4''-DICLOHEXANE-1,4-DIISOCYANATE, DICYCLOHEXYLMETHANE-4,4''-DI ISOCYANATE, META-XYLYLENE DISSOCYANATE, PARA-XYLYLENE DIISOCYANATE, META-PHENYLENE DIISOCYANATE, PARA-PHENYLENE DIISOCYANATE, A DIPHENYLMETHANE-4,4''-DIISOCYANATE, 1,3-DIISOCYANATO-METHYL CYCLOBUTANE, TOLUYENE-2,4-DIISOCYANATE, TOLYLENE-2,6-DIISOCYANATE, 1-CHLOROBENZENE-2,4-DIISOCYANATE, 1-METHYL CYCLOHEXANE-2,4-DIISOCYANATE AND 1METHYL CYCLOHEXANE-2,6-DIISOCYANATE AND N IS A POSITIVE INTEGER OF 1 TO 4.
Claim 2
Dependent Claim
94 words
AS A COMPOSITION OF MATTER, A CABAMYL BIURET POLYISOCYANATE HAVING THE FORMULA OCN-R-(N(-X)-CO-N(-X)-CO-N(-X)-R)N-NCO WHEREIN X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND -CO-NX-R-NCO AND AT LEAST ONE OF SAID GROUP MEMBER IS -CO-NX-R-NCO, R IS A DIVALENT ORGANIC RADICAL OBTAINED BY REMOVING THE -NCO GROUPS FROM AN ORGANIC DIISOCYANATE SELECTED FROM THE GROUP CONSISTING OF TETRAMETHYLENE DIISOCYANATE, HEXAMETHYLENE DIISOCYANATE, DICYCLOHEXYLMETHANE-4,4''-DICLOHEXANE-1,4-DIISOCYANATE, DICYCLOHEXYLMETHANE-4,4''-DI ISOCYANATE, META-XYLYLENE DISSOCYANATE, PARA-XYLYLENE DIISOCYANATE, META-PHENYLENE DIISOCYANATE, PARA-PHENYLENE DIISOCYANATE, A DIPHENYLMETHANE-4,4''-DIISOCYANATE, 1,3-DIISOCYANATO-METHYL CYCLOBUTANE, TOLUYENE-2,4-DIISOCYANATE, TOLYLENE-2,6-DIISOCYANATE, 1-CHLOROBENZENE-2,4-DIISOCYANATE, 1-METHYL CYCLOHEXANE-2,4-DIISOCYANATE AND 1METHYL CYCLOHEXANE-2,6-DIISOCYANATE AND N IS A POSITIVE INTEGER OF 1 TO 4.
References Cited (Backward Citations)
US3124605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |