Patent US2579332A successfully refreshed from Google Patents.
US2579332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the viscosity of liquid resinous organopolysiloxanes
Assignee: General Electric Co
•
Filing: 1950-02-11
•
Granted: 1951-12-18
•
Expires: 1970-02-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry C Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:06
CPC Classifications
C; C08; C08G; C08G12/00; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C08G77/14; C08G77/16; C08G77/18; C08G77/70; C08L; C08L83/00; C08L83/04; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE PROCESS WHICH COMPRISES (1) FORMING A SOLUTION IN AN INERT SOLVENT OF A HEAT-CONVERTIBLE LIQUID HYDROCARBON-SUBSTITUTED POLYSILOXANE IN WHICH THE HYDROCARBON GROUPS ARE ATTACHED TO THE SILICON ATOMS BY C-SI LINKAGES AND ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL, ARYL, ALKARYL, AND ARALKYL RADICALS, (2) ADDING TO SAID SOLUTION (A) FROM 0.01 TO 10%, BY WEIGHT, ZINC OXIDE BASED ON THE WEIGHT OF THE AFORESAID POLYSILOXANE AND (B) GLYCERINE IN AT LEAST A MOLAR EQUIVALENT TO THE AMOUNT OF ZINC OXIDE EMPLOYED, AND (3) HEATING THE AFORESAID SOLUTION AT A TEMPERATURE OF FROM 100* TO 200* C. UNTIL A RESINOUS SOLUTION OF HIGHER VISCOSITY IS OBTAINED
Claim 2
Dependent Claim
108 words
THE PROCESS WHICH COMPRISES (1) FORMING A SOLUTION IN AN INERT SOLVENT OF A HEAT-CONVERTIBLE LIQUID HYDROCARBON-SUBSTITUTED POLYSILOXANE IN WHICH THE HYDROCARBON GROUPS ARE ATTACHED TO THE SILICON ATOMS BY C-SI LINKAGES AND ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL, ARYL, ALKARYL, AND ARALKYL RADICALS, (2) ADDING TO SAID SOLUTION (A) FROM 0.01 TO 10%, BY WEIGHT, ZINC OXIDE BASED ON THE WEIGHT OF THE AFORESAID POLYSILOXANE AND (B) GLYCERINE IN AT LEAST A MOLAR EQUIVALENT TO THE AMOUNT OF ZINC OXIDE EMPLOYED, AND (3) HEATING THE AFORESAID SOLUTION AT A TEMPERATURE OF FROM 100* TO 200* C. UNTIL A RESINOUS SOLUTION OF HIGHER VISCOSITY IS OBTAINED
References Cited (Backward Citations)
US2389477A
Cited
US2457539A
Cited
US2467853A
Cited
US2495306A
Cited
GB606301A
Cited
US2528606A
Cited
US2501525A
Cited
US2482276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |