← Back to Patent Explorer
US3358009A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparing mixed cyclic organosiloxanes

Assignee: Union Carbide Corp
•
Filing: 1963-04-29
•
Granted: 1967-12-12
•
Expires: 1983-04-29
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 George M Omietanski
  • 👤 Thomas C Williams

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 03:34
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C07; C07F; C07F7/00; C07F7/02; C07F7/21

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 169 words
A PROCESS FOR THE PRODUCTION OF CYCLIC ORGANOSILOXANES OF SPECIFIC DESIRED COMPOSITION HAVING MIXED ORGANOSUBSTITUENTS WHICH COMPRISES REACTING IN THE PRESENCE OF AN INERT SOLVENT AN ORGANOSILOXANE DIOL HAVING THE FORMULA HO(R2SIO)NH WITH AN ORGANOSILANE COMPOUND IN AN AMOUNT SUFFICIENT TO REACT WITH ALL OF THE ORGANOSILOXANE DIOL PRESENT, SAID ORGANOSILANE COMPOUND HAVING THE FORMULA R2SICL3 WHEREIN R AND R1 ARE SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBY RADICALS CONNECTED TO SILICON THROUGH A CARBON-SILICON BOND AND MONOVALENT SUBSTITUTED HYDROCARBYL RADICALS BEING SELECTED FROM THE CLASS CONSISTING OF SUBSTITUTED ALKYL GROUPS, SUBSTITUTED ALKENYL GROUPS, SUBSTITUTED ARYL GROUPS, SUBSTI TUTED ALICYCLIC GROUPS, SUBSTITUTED ARALKYL GROUPS, AND SUBSTITUTED ALKARYL GROUPS AND CONTAINING SUBSTITUENTS FREE OF ACTIVE HYDROGEN, SAID MONOVALENT SUBSTITUTED HYUDROCARBYL RADICALS CONNECTED TO SILICON THROUGH A CARBON-SILICON BOND AND HAVING THE SUBSTITUENTS LOCATED AT LEAST TWO CARBON ATOMS FROM THE SILICON ATOM AND WHEREIN R AND R1 ARE DIFFERENT RADICALS, N IS AN INTEGER HAVING A VALUE FROM 2 TO 4 INCLUSIVE, AND RECOVERING THE DESIRED CYCLIC ORGANOSILICON PRODUCT.
Claim 2
Dependent Claim 169 words
A PROCESS FOR THE PRODUCTION OF CYCLIC ORGANOSILOXANES OF SPECIFIC DESIRED COMPOSITION HAVING MIXED ORGANOSUBSTITUENTS WHICH COMPRISES REACTING IN THE PRESENCE OF AN INERT SOLVENT AN ORGANOSILOXANE DIOL HAVING THE FORMULA HO(R2SIO)NH WITH AN ORGANOSILANE COMPOUND IN AN AMOUNT SUFFICIENT TO REACT WITH ALL OF THE ORGANOSILOXANE DIOL PRESENT, SAID ORGANOSILANE COMPOUND HAVING THE FORMULA R2SICL3 WHEREIN R AND R1 ARE SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBY RADICALS CONNECTED TO SILICON THROUGH A CARBON-SILICON BOND AND MONOVALENT SUBSTITUTED HYDROCARBYL RADICALS BEING SELECTED FROM THE CLASS CONSISTING OF SUBSTITUTED ALKYL GROUPS, SUBSTITUTED ALKENYL GROUPS, SUBSTITUTED ARYL GROUPS, SUBSTI TUTED ALICYCLIC GROUPS, SUBSTITUTED ARALKYL GROUPS, AND SUBSTITUTED ALKARYL GROUPS AND CONTAINING SUBSTITUENTS FREE OF ACTIVE HYDROGEN, SAID MONOVALENT SUBSTITUTED HYUDROCARBYL RADICALS CONNECTED TO SILICON THROUGH A CARBON-SILICON BOND AND HAVING THE SUBSTITUENTS LOCATED AT LEAST TWO CARBON ATOMS FROM THE SILICON ATOM AND WHEREIN R AND R1 ARE DIFFERENT RADICALS, N IS AN INTEGER HAVING A VALUE FROM 2 TO 4 INCLUSIVE, AND RECOVERING THE DESIRED CYCLIC ORGANOSILICON PRODUCT.

References Cited (Backward Citations)

US2684379A Cited
US3037962A Cited
US3133110A Cited
US3268570A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1970-12-11 1971-06-12 1971-12-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1974-12-11 1975-06-12 1975-12-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1978-12-11 1979-06-12 1979-12-12 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag