Chhabra Law Firm, PC

Silicon Valley. San Francisco. San Jose. Bay Area.



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Patent Basics
Cease & Desist Letters

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Can I refile a provisional patent application?


Yes, you may refile a provisional patent application as long as you have not publicly disclosed your invention and understand that you will not be able to take advantage of the previous provisional filing date.    Let’s get into the details: A provisional patent application is a temporary filing that holds your spot in a time based queue called the priority date, which, in case of provisional applications, is the filing date. This is the date the USPTO recognizes as your ...

USPTO Entity Status Explained!


As of March 19, 2013 USPTO fees is determined based on the size of an entity. For private, for-profit businesses, there are three main entities — large entity, small entity, and micro entity. Small entity status entails a 50% fee reduction from large entity fees and micro entity status entails a 75% fee reduction from large entity fees.  See 37 CFR 1.27 for more details. Here’s what you need to know:   1. Micro entity status: Entities or inventors that have less than (i) 4 ...

How to Patent a Mobile App


Can you patent a mobile app based idea? of course. However, there are caveats involved.   Tip: did you know — it may be advantageous to file design patent applications along with utility patent applications for a mobile or web app? Check out our animated video tutorials to learn more.   Let’s consider a hypothetical (inspired by a real patent application, filed by a big law firm for a big technology company). You come up with an improved idea of a ride sharing mobile ...

The PCT Patent Application


International patent applications for U.S. based inventions can be filed within one year (12 months) of filing a U.S. utility patent application (provisional or  non-provisional filing). The important thing to note, however, is that the one year clock starts from the earliest filing from which priority is claimed. Therefore, the one year clock starts from the date of filing the provisional application, if filed. If no provisional application is filed, then the one year clock starts from the ...

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Sample Work

Our patent attorney has secured numerous inventions for our clients.
Any result the attorney or firm may have achieved on behalf of a client does not necessarily indicate similar results can be obtained for other clients.


Our trademark and patent attorney assists clients with utility (provisional/non-provisional) patent applications, international applications, trademarks, responding/ formulating cease and desist letters, and other litigation related matters. We can help you strategize your patent portfolio according to your business needs. The USPTO provides a flow chart of the over all process.
A provisional patent application is a temporary application filed with the USPTO expiring within 1 year. Provisional patent applications are not examined by the USPTO and are held in confidence. Prior to the expiration of the provisional patent application, you will need to file a non-provisional patent application to initiate the examination process.
A trademark, trade mark, or trade-mark is a recognizable sign, design or expression which identifies products or services of a particular source from those of others. The trademark owner can be an individual, business organization, or any legal entity. A trademark may be located on a package, a label, a voucher or on the product itself. For the sake of corporate identity trademarks are also being displayed on company buildings. A trademark must be used in commerce.
A non-provisional application is a request pending at a patent office for the grant of a patent for the invention described and claimed by that application. A non-provisional application can claim priority from a filing date of a provisional application. The non-provisional application consists of a detailed description (patent specification), formal drawings, and claims together with official forms and correspondence relating to the application. It is important that the non-provisional application is crafted well as this document can eventually yield a patent.
A design patent is a form of legal protection granted to the ornamental design of a functional item. Design patents are a type of industrial design right. Ornamental designs of jewellery, furniture, beverage containers and computer icons are examples of objects that are covered by design patents. It is important that you contact your patent attorney and inquire if a design patent can further secure your IP rights.
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