US3245957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting an isocyanate with an active hydrogen compound in the presence of an antimonite catalyst
Assignee: Hooker Chemical Corp
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Filing: 1964-08-18
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Granted: 1966-04-12
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Expires: 1984-08-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Hindersinn
- 👤 Stephen M Creighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS WHICH COMPRISES REACTING TOGETHER AN ORGANIC COMPOUND CONTAINING THE RADICAL - N=C=O, AND AN ACTIVE HYDROGEN-CONTAINING COMPOUND AS DETERMINED BY THE ZEREWITINOFF METHOD, SAID REACTION BEING PERFORMED IN THE PRESENCE OF A CATALYTIC AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIS(HYDROCARBYL) ANTIMONITE AND A TRIS (HALOHYDROCARBYL) ANTIMONITE, WHEREIN THE HYDROCARBYL RADICALS HAVE 1 TO 8 CARBON ATOMS AND THE HALOGEN SUBSTITUENTS ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND MIXTURES THEREOF.
Claim 2
Dependent Claim
79 words
THE PROCESS WHICH COMPRISES REACTING TOGETHER AN ORGANIC COMPOUND CONTAINING THE RADICAL - N=C=O, AND AN ACTIVE HYDROGEN-CONTAINING COMPOUND AS DETERMINED BY THE ZEREWITINOFF METHOD, SAID REACTION BEING PERFORMED IN THE PRESENCE OF A CATALYTIC AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A TRIS(HYDROCARBYL) ANTIMONITE AND A TRIS (HALOHYDROCARBYL) ANTIMONITE, WHEREIN THE HYDROCARBYL RADICALS HAVE 1 TO 8 CARBON ATOMS AND THE HALOGEN SUBSTITUENTS ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND MIXTURES THEREOF.
References Cited (Backward Citations)
US2865869A
Cited
US3061557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |