Catalytic Distillation Technologies
6 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 8 name spellings.
23
Ending by 2030
Jul 2027
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 1 fee due Dec 23, 2026The maintenance fee for Method for producing high VCM coke (US 9,062,256) comes due Dec 23, 2026. Unpaid by Jun 23, 2027, it lapses early.
- 1 fee due Mar 22, 2027The maintenance fee for Method for the production of dimethyl ether (US 9,139,503) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
- 1 fee due Aug 9, 2027The maintenance fee for Process and catalyst for cracking of ethers and alcohols (US 9,254,479) comes due Aug 9, 2027. Unpaid by Feb 9, 2028, it lapses early.
- 1 fee due Sep 1, 2027The maintenance fee for Process for the conversion of alcohols to olefins (US 9,272,965) comes due Sep 1, 2027. Unpaid by Mar 1, 2028, it lapses early.
- 1 fee due Oct 19, 2027The maintenance fee for Process for ultra low benzene reformate using catalytic distillation (US 9,315,741) comes due Oct 19, 2027. Unpaid by Apr 19, 2028, it lapses early.
Recent changes
- 3 terms have ended since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,476,637 | Coated catalyst for aromatic alkylation In force · From the USPTO record | In force | From the USPTO record | |
| US 7,547,810 | Coated catalyst for aromatic alkylation In force · From the USPTO record | In force | From the USPTO record | |
| US 7,553,995 | Method of producing tertiary amyl ethyl ether In force · From the USPTO record | In force | From the USPTO record | |
| US 8,415,495 | Process for continuous production of organic carbonates or organic carbamates and solid catalysts therefore In force · From the USPTO record | In force | From the USPTO record | |
| US 7,888,541 | Double bond hydroisomerization of butenes In force · From the USPTO record | In force | From the USPTO record | |
| US 7,745,674 | Alkylation slurry reactor In force · From the USPTO record | In force | From the USPTO record | |
| US 7,825,282 | Process for the conversion of tertiary butyl alcohol to ethyl tertiary butyl ether In force · From the USPTO record | In force | From the USPTO record | |
| US 8,829,260 | Process and catalyst for cracking of ethers and alcohols In force · From the USPTO record | In force | From the USPTO record | |
| US 9,254,479 | Process and catalyst for cracking of ethers and alcohols In force · From the USPTO record | In force | From the USPTO record | |
| US 8,236,172 | Process to hydrodesulfurize FCC gasoline resulting in a low-mercaptan product In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 39: 6 patents in force now held by others · 42 lapsed for an unpaid fee · 192 ended at full term · 1 surrendered on reissue. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
34 no status recorded