ROI Optoelectronics Technology CO, LTD.
4 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.
0
Ending by 2030
May 2041
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 Nov 30, 2026The maintenance fee for Time and frequency method and system for optical comb (US 11,664,635) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
- 1 fee due Mar 19, 2027The maintenance fee for Method for preparing graphene material from industrial hemp by laser induction (US 11,760,638) comes due Mar 19, 2027. Unpaid by Sep 20, 2027, it lapses early.
- 1 fee due Aug 13, 2027The maintenance fee for Method and apparatus for preparing femtosecond optical filament interference direct writing volume grating/chirped volume grating (US 11,899,229) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
- 3 fees due Oct 2 to 23, 2027 · next Oct 2
Recent changes
- 1 of the patents on this record was granted since Aug 17, 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 11,664,635 | Time and frequency method and system for optical comb In force · From the USPTO record | In force | From the USPTO record | |
| US 11,370,657 | Method and apparatus for manufacturing microfluidic chip with femtosecond plasma grating In force · From the USPTO record | In force | From the USPTO record | |
| US 11,579,091 | Non-contact spatial super-resolution coherent Raman spectrometric imaging method In force · From the USPTO record | In force | From the USPTO record | |
| US 11,760,638 | Method for preparing graphene material from industrial hemp by laser induction In force · From the USPTO record | In force | From the USPTO record | |
| US 11,964,340 | Device for fabricating quartz microfluidic chip by femtosecond pulse cluster In force · From the USPTO record | In force | From the USPTO record | |
| US 11,899,229 | Method and apparatus for preparing femtosecond optical filament interference direct writing volume grating/chirped volume grating In force · From the USPTO record | In force | From the USPTO record | |
| US 11,944,957 | Glass fiber filter element for visible light photocatalysis and air purification and preparation method thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 11,965,827 | Hyperspectral imaging method and apparatus In force · From the USPTO record | In force | From the USPTO record | |
| US 12,276,613 | Multipulse-induced spectroscopy method and device based on femtosecond plasma grating In force · From the USPTO record | In force | From the USPTO record | |
| US 12,088,057 | Driving and stabilization system for pump laser In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 24: 4 patents in force now held by others. 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.
6 pending · 1 no status recorded