FR2088597A5
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Grafted silicone resins - with vinyl pyrrolidone by heating
Assignee: Bpifrance Financement SA
•
Filing: 1970-04-17
•
Granted: 1972-01-07
•
Expires: 1990-04-17
Abstract
Abstract Preparing graft copolymers by heating a silicone resin in the presence of vinylpyrrolidone at >110 degrees C. The process is simpler than prior art processes and gives good yields. The grafted resins have improved hydrophilic properties and are useful as prosthetics, contact lenses etc.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 00:45
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/12; C08F283/124
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.