US 8821819 — Patent Expiration

SORBENTS FOR THE OXIDATION AND REMOVAL OF MERCURY

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Important: This calculator does not include patent term extension under 35 U.S.C. § 156, which may apply to certain drug, biologic, animal drug, and medical device patents.

Learn more about PTE and patent expiration

US 8821819

Sorbents For The Oxidation And Removal Of Mercury

High Confidence

Application No. 13966768

August 22, 2025

Expired 322 days ago

Earliest effective filing

Aug 22, 2005

+ 20 years

Aug 22, 2025

PTA +0d

Aug 22, 2025

TD cap (US 8512655)

Aug 22, 2025

Final

Aug 22, 2025

This calculation includes Patent Term Adjustment (PTA) under 35 U.S.C. §154(b). Patent Term Extension (PTE) under 35 U.S.C. §156 (for FDA-regulated products) is not included. Note: terminal disclaimers can affect PTA (In re Cellect, LLC).

Calculation Details

Base Term Calculation

Filing Date

August 14, 2013

Earliest Effective Filing

August 22, 2005

Issue Date

September 2, 2014

PTA

0 days

Base Expiry (before PTA)

August 22, 2025

August 22, 2005 + 20 years = August 22, 2025

Continuation of application 13427665, filed Mar 22, 2012, issued as US 8512655

Continuation of application 12419219, filed Apr 6, 2009, issued as US 8168147

Continuation of application 12201595, filed Aug 29, 2008

Divisional of application 11209163, filed Aug 22, 2005, issued as US 7435286

Continuation of application 12201595, filed Aug 29, 2008

Divisional of application 11209163, filed Aug 22, 2005, issued as US 7435286

Continuation of application 12419219, filed Apr 6, 2009, issued as US 8168147

Continuation of application 12201595, filed Aug 29, 2008

Divisional of application 11209163, filed Aug 22, 2005, issued as US 7435286

PRO

60605640 — Provisional — not used for base term

PRO

60605640 — Provisional — not used for base term

PRO

60605640 — Provisional — not used for base term

PRO

60605640 — Provisional — not used for base term

PRO

60605640 — Provisional — not used for base term

Terminal Disclaimer Analysis

TD Approved

1 approved, 2 filed

TD caps expiration to August 22, 2025 (earliest expiring referenced patent: US 8512655)

US 3338005

Could not resolve calculation details

US 8512655(App. 13427665)

Capping Patent

Sorbents For The Oxidation And Removal Of Mercury

Filing Date

Mar 22, 2012

Earliest Effective Filing

Aug 22, 2005

Issue Date

Aug 20, 2013

PTA

0 days

Calculated Expiration

Aug 22, 2025

Continuation of 12419219, filed Apr 6, 2009, issued as US 8168147

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Aug 22, 2005 + 20y = Aug 22, 2025

US 8821819(App. 13966768)(from app 13966768)

Sorbents For The Oxidation And Removal Of Mercury

Filing Date

Aug 14, 2013

Earliest Effective Filing

Aug 22, 2005

Issue Date

Sep 2, 2014

PTA

0 days

Calculated Expiration

Aug 22, 2025

Continuation of 13427665, filed Mar 22, 2012, issued as US 8512655

Continuation of 12419219, filed Apr 6, 2009, issued as US 8168147

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Continuation of 12419219, filed Apr 6, 2009, issued as US 8168147

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Aug 22, 2005 + 20y = Aug 22, 2025

US 8168147(App. 12419219)

Sorbents For The Oxidation And Removal Of Mercury

Filing Date

Apr 6, 2009

Earliest Effective Filing

Aug 22, 2005

Issue Date

May 1, 2012

PTA

0 days

Calculated Expiration

Aug 22, 2025

Continuation of 12201595, filed Aug 29, 2008

Divisional of 11209163, filed Aug 22, 2005, issued as US 7435286

Aug 22, 2005 + 20y = Aug 22, 2025

Data sourced from public USPTO records. This tool provides informational estimates and should not be relied upon as legal advice. Always verify patent expiration dates independently, especially where patent term extension, terminal disclaimers, or unusual continuity issues may apply.