Questions related to The Patent Cooperation Treaty based applications.

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Which countries require a claim for using a PPA as priority date?

The book Patent It Yourself states: I recommend that your PPA contain at least one claim (to) prevent any challenge to your PPA by foreign patent offices for failure to claim the invention as of ...
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What is difference between PCT and EP and can they be disputed?

I need to know what these are exactly and if they are enforceable. Is there a way to know if the PCT has an expire date or how many times it's been filed and published? Or how to know if anyone has ...
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File Patent Internationally on Behalf of Others

I have been thinking about patenting a product that I have been developing together with a friend, and was wondering if you guys could help me out with some question: Am I able to patent something ...
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the application in US through the PCT

We are filing the national stage application in US through the PCT. We have prepared the documents /Specification(in English) /Claims /Abstract /Drawings /ApplicationDataSheet /PrimaryAmendment /IDS ...
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PCT and Prior Art

Let's say I file for a PCT (or even a US/EU/China Patent) And then I advertise about my technology on my website, way before anything is granted (including details) Does this count as prior art and ...
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Can PCT application based on US provisional patent without claim?

AFAIK, US provisional patent is valid for later use even without any claim, but I heard that some countries require patent having claims. So does PCT application accepts US provisional patent without ...
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Can I file US provisional patent, and publish the invention, then file for PCT after that? For how long can it be legal?

I will file provisional patent, then publish it. Can I file PCT application after that based on US provisional priority date? If yes, what is the maximum time I can have before filing PCT ...
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What is a PCT number?

What does a published PCT number mean exactly? (Of the form PCT/IB2011/nnnnnn). Does it grant any legal/intellectual rights in any way? Does it have any effect in this regard that a WO2013nnnnnnA1 ...
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If I file a provisional patent application, could someone else file a PCT application for the same invention during the first 12 months?

I'm working in a startup with a limited amount of investment. We'd like to file for a US provisional patent. My understanding is that after 12 months, I can upgrade to a PCT application. For this ...
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Rule 131 Antedating for a National Stage application

For the given circumstances: Reference filed on Jan. 1, 2010. PCT Application filed on Feb. 1, 2010. US National Stage claiming priority to the PCT Application filed on Mar. 1, 2010. Reference was ...