Aromatic-Linked Polyamine Macrocyclic Compounds with Anti-HIV Activity
US RE42,152 In forceTerm ends Feb 15, 2033 · From the USPTO record
20-year base term ends Feb 15, 2028
Reissue of US 05,583,131, which was surrendered when this reissue was granted; its term and maintenance fees continue here.
Dec 16, 1992
Feb 15, 2033
Feb 15, 2011
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, the 1995 transition rule | Granted Feb 15, 2011 + 17 years, or clock starts Dec 16, 1992 + 20 years, whichever is later; a parent in its chain could not be resolved (the next row) | Feb 15, 2028 | High confidence |
| Continuity chain | A reissue: its term follows the original patent's, with the original's term adjustment; a parent in the chain could not be resolved | dated from this application's own claim | Low confidence |
| Patent term adjustment | No term adjustment record on a grant after 2005, so none is added | no change | Medium confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | +5 years, USPTO 35 U.S.C. 156 certificate | added to Feb 15, 2028: Feb 15, 2033 | High confidence |
| Fee events | The reissue's fees post to its original, whose fee record is not available (likely before 2001) | In force | Medium confidence |
| Computed term end | The steps above, in order | Feb 15, 2033 | From the USPTO record |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.