To quote the press release:
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The companies also entered into a ten-year patent cross license agreement covering each company's products. >>
Both Intel and VIA will have to right to have access to each other's technologies for the next 10 years in order to make their own products. This looks like it could include stuff like SSE2, Hyperthreading, etc.
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As part of the agreement Intel granted VIA a license to sell microprocessors that are compatible with the x86 instruction set but not pin compatible or bus compatible with Intel microprocessors. >>
During this 10 year period, VIA is allowed to make x86 compatible CPUs like the C3. However, they may not use the same sockets as Intel (sockets 370, 423, 478, etc.), nor may they use the same buses (e.g., Quad-Pumped 533 MHz FSB). This is more or less the situation with AMD right now: x86-compatible Athlon, but using Socket A and EV6 bus.
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Intel further agreed for a period of three years, not to assert its patents on VIA bus or pin compatible microprocessors. >>
As an exception to the above, VIA will be allowed to continue making and selling CPUs that do use Intel sockets and buses for 3 years. That means that the existing C3 processors are fine and legal from now until 2006. Within that span of time, they can also make P4 compatible CPUs, if they want.
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Intel also granted VIA a four year license to design and sell chip sets that are compatible with the Intel microprocessor bus and agreed not to assert its patents on VIA or its customers or distributors on such chip sets for a fifth year. >>
Another exception to the above.
VIA can continue making Intel-compatible chipsets until 2007, and it can continue to sell then until 2008. So there's your answer.
Of course, it probably helps that the link now works.