Extensions

To detail the information for US patent 8408778, I will refer to the patent text itself and general USPTO guidelines regarding patent term calculations and related applications. The USPTO does not calculate expiration dates for patents; instead, it provides tools and guidelines for estimation.

US Patent 8408778 Details

1. Patent Term Adjustments (PTA)
Patent Term Adjustment (PTA) extends the term of a patent to compensate for delays by the USPTO during prosecution. This patent's Google Patents page indicates an "Adjusted expiration" date of 2031-05-07. This adjusted date implies that PTA was applied to compensate for USPTO delays during the application's prosecution. The specific calculation for PTA (A, B, and C delays, and applicant delays) is typically found in the Issue Notification Letter.

2. Patent Term Extensions (PTE)
Patent Term Extension (PTE) is available under the Hatch-Waxman Act for patents claiming products requiring regulatory approval (e.g., pharmaceuticals, medical devices) to restore patent term lost during the approval process. Given that US patent 8408778 relates to a "Light source and display device," it does not fall under the categories of inventions eligible for PTE. Therefore, it is highly unlikely that any Patent Term Extension was granted for this patent.

3. Continuation Applications
A continuation application allows an applicant to pursue additional claims based on the same disclosure of an earlier "parent" application, maintaining the benefit of the parent's filing date. The patent text for US8408778 (specifically the "Publications" and "Family Applications" sections on Google Patents) does not explicitly list any continuation applications that were filed from US12/698,478 (the application leading to US8408778).

4. Divisional Applications
A divisional application is filed when an invention disclosed in a parent application is deemed to cover more than one independent and distinct invention. Like continuations, they benefit from the filing date of the original application. The provided patent text does not explicitly list any divisional applications that were filed from US12/698,478.

5. Related Family Members
US8408778 is part of a patent family. The provided information shows the following related family members:

• Priority Application: Korean Patent Application No. 10-2009-0013161, filed 2009-02-17. [cite: The provided patent text]
• US Application: US12/698,478, filed 2010-02-02 (which resulted in US8408778B2). [cite: The provided patent text]
• Other Published Applications/Granted Patents within the family:
  • US20100208495A1 (US Publication). [cite: The provided patent text]
  • KR20100093981A (Korean Publication). [cite: The provided patent text]
  • EP2218963A3 (European Publication). [cite: The provided patent text]
  • JP5519317B2 (Japanese Granted Patent). [cite: The provided patent text]
  • CN101806414B (Chinese Granted Patent). [cite: The provided patent text]

6. Projected Expiration Date
The basic term for a U.S. utility patent filed on or after June 8, 1995, is 20 years from the earliest filing date of the application, subject to any Patent Term Adjustments (PTA) or extensions (PTE).

• Earliest Priority Date: 2009-02-17 (Korean Patent Application No. 10-2009-0013161). [cite: The provided patent text]
• US Filing Date: 2010-02-02 (US12/698,478). [cite: The provided patent text]
• Basic 20-year Term from Earliest Filing Date (US Application): 20 years from 2010-02-02 would be 2030-02-02.
• Adjusted Expiration Date: The Google Patents page for US8408778B2 explicitly lists the "Adjusted expiration" as 2031-05-07. This date reflects any PTA awarded due to USPTO delays during prosecution. [cite: The provided patent text]

Therefore, the projected expiration date for US patent 8408778, inclusive of Patent Term Adjustment, is May 7, 2031. [cite: The provided patent text]