Method of neutralizing amine gas odor in cold box process, and amine gas generator using the same
US 9,592,552 Lapsed on the fee recordLapsed Mar 14, 2021 on the fee record · From the USPTO record
20-year base term ends Apr 29, 2035
First maintenance fee unpaid; grace period ended.
Apr 29, 2015
Mar 14, 2021
Mar 14, 2017
Apr 29, 2035
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Apr 29, 2015, when this application, 14/699,118, was filed | Apr 29, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High 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 | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | lapsed Mar 14, 2021 | High confidence |
| Computed term end | The steps above, in order | Mar 14, 2021 | From the USPTO record |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
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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
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