"Patent pending" means a patent application has been filed but not yet granted, and it carries no enforceable legal rights on its own. It signals to competitors and investors that formal protection is in progress, and the status can only be used from the actual filing date, not before.

Patent pending status begins the moment a valid application is filed and continues until the application is granted, rejected, or abandoned, typically 18 months to 3 years for a utility application. It does not itself provide enforceable rights against competitors.

"Patent pending" means an application has been filed and is under review, with no enforceable rights yet; "patented" means the patent has actually been granted and can be enforced against infringers. Competitors can legally copy a patent-pending product until the patent grants, unless it separately infringes another already-granted patent.

Patent pending status lasts from filing until a final decision, typically 18 months to 3 years for a US utility application and often longer in Europe, though it can be shorter with expedited examination or longer if multiple office actions are needed. A US provisional application specifically gives 12 months of patent pending status before a non-provisional must be filed.

A US utility patent typically takes 18 months to 3 years from filing to grant, and a European patent through the EPO often takes 3 to 5 years, depending on the technology area and how many rounds of office actions occur. Software and business method applications tend to sit at the slower end of those ranges.

Average time to a first office action commonly runs 12 to over 24 months depending on the technology area, with total time to a final decision, including responses to any rejections, typically landing at two to three years in the US and longer in Europe. Acceleration programmes can cut this significantly: the USPTO's Track One reaches a decision in roughly 6 to 12 months for an additional fee, while the EPO's PACE programme and UK IPO accelerated examination are free on request.

The prosecution timeline runs from filing through examiner review, one or more rounds of office actions and responses, and finally allowance or final rejection, commonly spanning two to three years total. Complex or heavily contested applications, especially in software, can take longer.

A utility patent lasts 20 years from the filing date in virtually every country, provided maintenance or annual renewal fees are paid on schedule; a US design patent lasts 15 years from grant, and EU/UK registered designs up to 25 years. No patent can be extended once its term expires, apart from limited regulatory extensions for pharmaceuticals in some jurisdictions.

Patent expiration means the term has ended, either naturally after 20 years (utility patents everywhere) or 15-25 years (design protection, depending on jurisdiction), or early due to a missed maintenance or renewal fee. Once expired, the invention enters the public domain and anyone can make, use or sell it freely.

Patent term is the length of enforceable protection a patent provides: 20 years from filing for utility patents worldwide, and 15 years from grant for US design patents (up to 25 years for EU/UK registered designs). In the US, patent term adjustment for USPTO examination delays can extend a utility patent slightly beyond the standard 20 years, and several jurisdictions offer regulatory extensions for pharmaceuticals.

Patents don't "renew" beyond their maximum term, but they do require ongoing payments to stay in force: annual renewal fees in most countries, including the UK and Germany, or US maintenance fees at 3.5, 7.5 and 11.5 years after grant. US design and plant patents require no ongoing payments at all.

Renewal fees are the ongoing payments that keep a patent in force: most countries charge an annual fee that rises year by year, while the US instead requires three maintenance fee payments after grant, each larger than the last. A 6-month grace period is available in most jurisdictions if a payment is missed, at an added surcharge.

Patent infringement is making, using, selling or importing a patented invention without the patent owner's permission during the patent's active term. It's determined by comparing the accused product or process against the specific wording of the patent's claims.

A patent owner who identifies infringement can send a cease-and-desist letter, negotiate a licence, or file an infringement lawsuit seeking damages or an injunction. Enforcement is entirely the patent owner's responsibility; the patent office doesn't police infringement itself.

An application becomes abandoned if the applicant fails to respond to an office action within the statutory deadline, including any paid extensions, and it stops being enforceable or protectable. Abandoned applications can sometimes be revived within a limited window, but this adds cost and delay.