US3222320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equilibration of organosiloxane polymers
Assignee: Union Carbide Corp
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Filing: 1961-10-16
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Granted: 1965-12-07
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Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:31
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE PROCESS WHICH COMPRISES CONTACTING AN ORGANOSILOXANE POLYMER CONSISTING ESSENTIALLY OF UNITS HAVING THE FORMULA: (R-)N-SI-O((4-N)/2) WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC CARBON TO CARBON MULTIPLE BONDS, AND SUBSTITUTED MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC CARBON TO CARBON MULTIPLE BONDS, EACH SUBSTITUENT BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE CYANO, CARBOXY, NITRO AND CHLORO GROUPS AND N HAS AN AVERAGE VALUE OF FROM 1 TO 3 WITH A CATALYTIC AMOUNT OF A HYDROPOLYHALIDE ACID CHOSEN FROM THE GROUP CONSISTING OF (HI-I2), (HI-I-BR2) AND (HI-BR2) AT A REACTION TEMPERATURE OF BETWEEN 0*C. AND 60*C. TO EFFECT REARRANGEMENT OF THE MOLECULAR STRUCTURE OF THE ORGANOSILOXANE POLYMER.
Claim 2
Dependent Claim
119 words
THE PROCESS WHICH COMPRISES CONTACTING AN ORGANOSILOXANE POLYMER CONSISTING ESSENTIALLY OF UNITS HAVING THE FORMULA: (R-)N-SI-O((4-N)/2) WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC CARBON TO CARBON MULTIPLE BONDS, AND SUBSTITUTED MONOVALENT HYDROCARBON RADICALS FREE OF ALIPHATIC CARBON TO CARBON MULTIPLE BONDS, EACH SUBSTITUENT BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE CYANO, CARBOXY, NITRO AND CHLORO GROUPS AND N HAS AN AVERAGE VALUE OF FROM 1 TO 3 WITH A CATALYTIC AMOUNT OF A HYDROPOLYHALIDE ACID CHOSEN FROM THE GROUP CONSISTING OF (HI-I2), (HI-I-BR2) AND (HI-BR2) AT A REACTION TEMPERATURE OF BETWEEN 0*C. AND 60*C. TO EFFECT REARRANGEMENT OF THE MOLECULAR STRUCTURE OF THE ORGANOSILOXANE POLYMER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |