Maintenance fees coming due

Ambrx, Inc.

9 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Jan 14, 2027. Unpaid by Jul 14, 2027, that one lapses early.

A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5 and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the six month grace period that follows.

Patent	Title	Holder	Status	Fee due	Lapses if unpaid	Expires	Confidence
US 9,079,971	Modified FGF-21 Polypeptides comprising non-naturally occurring amino acids. Ambrx, Inc. In force Fee due Jan 14, 2027 Lapses if unpaid Jul 14, 2027 Term ends Mar 19, 2028 · High confidence	Ambrx, Inc.	In force	Jan 14, 2027	Jul 14, 2027	Term ends Mar 19, 2028	High confidence
US 10,377,805	Modified FGF-21 Polypeptides Comprising Non-Naturally Encoding Amino Acids and Their Uses Ambrx, Inc. In force Fee due Feb 13, 2027 Lapses if unpaid Aug 13, 2027 Term ends Mar 19, 2028 · High confidence	Ambrx, Inc.	In force	Feb 13, 2027	Aug 13, 2027	Term ends Mar 19, 2028	High confidence
US 9,121,024	Non-Natural Amino Acid Replication-Dependent Microorganisms and Vaccines Ambrx, Inc. In force Fee due Mar 1, 2027 Lapses if unpaid Sep 1, 2027 Term ends Aug 25, 2030 · High confidence	Ambrx, Inc.	In force	Mar 1, 2027	Sep 1, 2027	Term ends Aug 25, 2030	High confidence
US 9,121,025	Non-Natural Amino Acid Replication-Dependent Microorganisms and Vaccines Ambrx, Inc. In force Fee due Mar 1, 2027 Lapses if unpaid Sep 1, 2027 Ends no later than Sep 28, 2029 · Medium confidence	Ambrx, Inc.	In force	Mar 1, 2027	Sep 1, 2027	Ends no later than Sep 28, 2029	Medium confidence
US 9,133,495	Hybrid Suppressor Trna for Vertebrate Cells Ambrx, Inc. In force Fee due Mar 15, 2027 Lapses if unpaid Sep 15, 2027 Term ends Jun 14, 2029 · High confidence	Ambrx, Inc.	In force	Mar 15, 2027	Sep 15, 2027	Term ends Jun 14, 2029	High confidence
US 10,428,333	Non-Natural Amino Acid Replication-Dependent Microorganisms and Vaccines Ambrx, Inc. In force Fee due Apr 1, 2027 Lapses if unpaid Oct 1, 2027 Term ends Sep 28, 2029 · Medium confidence	Ambrx, Inc.	In force	Apr 1, 2027	Oct 1, 2027	Term ends Sep 28, 2029	Medium confidence
US 11,786,578	Modified Relaxin Polypeptides and Their Uses Ambrx, Inc. In force Fee due Apr 17, 2027 Lapses if unpaid Oct 18, 2027 Term ends Aug 17, 2031 · High confidence	Ambrx, Inc.	In force	Apr 17, 2027	Oct 18, 2027	Term ends Aug 17, 2031	High confidence
US 11,851,488	ANTI-CD3-FOLATE Conjugates and Their Uses Ambrx, Inc. In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 Term ends Nov 2, 2036 · High confidence	Ambrx, Inc.	In force	Jun 26, 2027	Dec 27, 2027	Term ends Nov 2, 2036	High confidence
US 11,851,662	Methods and Compositions for Promoting Non-Natural Amino Acid-Containing Protein Production Ambrx, Inc. In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 Term ends Oct 10, 2040 · High confidence	Ambrx, Inc.	In force	Jun 26, 2027	Dec 27, 2027	Term ends Oct 10, 2040	High confidence

9 of 9 patents shown. Soonest fee due date first, then patent number.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.