Video disc lubricants
CA 1135843 A · Owner: Rca Corporation · Inventors: Ekstrom, Lincoln; Wielicki, Henry; Wang, Chih C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 73,676, VIDEO DISC LUBRICANTS, ABSTRACT OF THE DISCLOSURE Siloxanes of the formula, wherein R3 and R3? independently at each occurrence are long chain alkyl groups and m is an integer of 0 or 1 can be employed as lubricants for video discs. The lubricants are stable to long term storage and to wide variations in temperature and humidity.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.