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Re: zip chip schematic
Scott Alfter wrote:<snip>
Sorry if this is a dup but google has posted my previous attempt yet
> (Would a patent issued in 1988 have run out already? For the longest time,
> patents were good for 17 years, but at some point, they switched to 20
> years. Even if the issued patent was for 20 years, it might already have
> run out if the periodic maintenance fees weren't paid. There's no
> indication on the USPTO website of whether the ZipChip patent is still
> valid.)
>
Patent Number: 4794523 Application Number: 06782664
Issue Date: 12/27/1988 Filing Date: 09/30/1985
Title: CACHE MEMORY ARCHITECTURE FOR MICROCOMPUTER SPEED-UP BOARD
--> Status: Expired, No 4th year fee paid by: 12/28/1992 Entity: Small
Window Opens: 12/27/1991 Surcharge Date: 06/30/1992 Expiration:
12/27/1992
Fee Amt Due: $0.00 Surchg Amt Due: $0.00 Total Amt Due: $0.00
Fee Code:
Surcharge Fee Code:
Most recent events (up to 7): 1992/12/27
1992/07/28
Patent Expired for Failure to Pay Maintenance Fees.
Maintenance Fee Reminder Mailed.
--- End of Maintenance History ---
Glenn