US3243410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon polymerizing catalyst
Assignee: Dow Silicones Corp
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Filing: 1963-03-29
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Granted: 1966-03-29
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Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Donald E Mcvannel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C07; C07C; C07C323/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
A METHOD OF POLYMERIZING ORGANOSILICON COMPOUNDS WHICH COMPRISES CONTACTING (1) AN ORGANOSILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) ORGANOSILICON COMPOUNDS HAVING AN AVERAGE PER SILICON ATOM OF 1 TO 3 INCLUSIVE SUBSTITUENT GROUPS SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, MONOVALENT HALOHYDROCARBON RADICALS AND CYANOLKYL RADICALS, AND AT LEAST ONE SIOH GROUP PER MOLECULE, ANY REMAINING VALENCES OF THE SILICON ATOMS OF SAID ORGANOSILICON COMPOUND BEING SATISFIED BY SELECTION FROM THE GROUP CONSISTING OF DIVALENT OXYGEN ATOMS, DIVALENT HYDROCARBON RADICALS, DIVALENT HYDROCARBON ETHER RADICALS CONTAINING NO MORE THAN ONE OXYGEN AND THEREIN, AND HALOARYLENE RADICALS, (B) DIORGANOSILOXANE CYCLIC TRIMERS WHREIN THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, MONOVALENT HALOHYDROCARBON RADICALS AND CYANOALKYL RADICALS, (C) DIORGANO-SILETHYLENESILOXANE CYCLIC DIMERS WHEREIN THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON AND HALOHYDROCARBON RADICALS, EACH FREE OF ALIPHATIC UNSATURATION, AND CYANOALKYL RADICALS, AND (D) MIXTURES THEREOF WITH (2) A COMPOUND OF THE FORMULA R(SM)X WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF UNSUBSTI TUTED AND SUBSTITUTED HYDROCARBON RADICALS OF VALENCE X, M IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, TETRAORGANONITROGEN RADICALS AND TETRAORGANOPHOSPHORUS RADICALS, THE ORGANIC RADICALS OF THE SAID NITROGEN AND PHOSPHORUS RADICALS BEING MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC UNSATURATION ATTCHED DIRECTLY TO THE SAID NITROGEN AND PHOSPHORUS ATOMS, AND X HAS A VALUE OF FROM 1 TO 4 INCLUSIVE.
Claim 2
Independent Claim
234 words
A METHOD OF POLYMERIZING ORGANOSILICON COMPOUNDS WHICH COMPRISES CONTACTING (1) AN ORGANOSILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) ORGANOSILICON COMPOUNDS HAVING AN AVERAGE PER SILICON ATOM OF 1 TO 3 INCLUSIVE SUBSTITUENT GROUPS SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, MONOVALENT HALOHYDROCARBON RADICALS AND CYANOLKYL RADICALS, AND AT LEAST ONE SIOH GROUP PER MOLECULE, ANY REMAINING VALENCES OF THE SILICON ATOMS OF SAID ORGANOSILICON COMPOUND BEING SATISFIED BY SELECTION FROM THE GROUP CONSISTING OF DIVALENT OXYGEN ATOMS, DIVALENT HYDROCARBON RADICALS, DIVALENT HYDROCARBON ETHER RADICALS CONTAINING NO MORE THAN ONE OXYGEN AND THEREIN, AND HALOARYLENE RADICALS, (B) DIORGANOSILOXANE CYCLIC TRIMERS WHREIN THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, MONOVALENT HALOHYDROCARBON RADICALS AND CYANOALKYL RADICALS, (C) DIORGANO-SILETHYLENESILOXANE CYCLIC DIMERS WHEREIN THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON AND HALOHYDROCARBON RADICALS, EACH FREE OF ALIPHATIC UNSATURATION, AND CYANOALKYL RADICALS, AND (D) MIXTURES THEREOF WITH (2) A COMPOUND OF THE FORMULA R(SM)X WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF UNSUBSTI TUTED AND SUBSTITUTED HYDROCARBON RADICALS OF VALENCE X, M IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, TETRAORGANONITROGEN RADICALS AND TETRAORGANOPHOSPHORUS RADICALS, THE ORGANIC RADICALS OF THE SAID NITROGEN AND PHOSPHORUS RADICALS BEING MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC UNSATURATION ATTCHED DIRECTLY TO THE SAID NITROGEN AND PHOSPHORUS ATOMS, AND X HAS A VALUE OF FROM 1 TO 4 INCLUSIVE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |