CCCC First Harbor Engineering 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
Nov 2037
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 13, 2026The maintenance fee for Semi-submersible immersed tube transportation and installation integrated ship and construction process (US 11,674,283) comes due Dec 13, 2026. Unpaid by Jun 14, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
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.
Showing 1 to 6 of 6
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,836,459 | Self-propelled integrated ship for transporting and installing immersed tubes of underwater tunnel and construction process In force · From the USPTO record | In force | From the USPTO record | |
| US 10,781,567 | Foundation treatment method for piling foundation structure by penetrating hardpan layer In force · From the USPTO record | In force | From the USPTO record | |
| US 11,655,608 | Water Stopping Device of Suspension and Sliding Type and an Application Thereof In force · High confidence | In force | High confidence | |
| US 11,674,283 | Semi-submersible immersed tube transportation and installation integrated ship and construction process In force · From the USPTO record | In force | From the USPTO record | |
| US 12,215,470 | Water Replacement Type Storage Field Construction Method and Storage Field In force · High confidence | In force | High confidence | |
| US 12,448,089 | Top-Lock Pull-Out Type Connecting Device and Immersed Tube Construction Ship In force · High confidence | In force | High confidence |
Also on record, not counted in the 6: 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.
2 pending · 2 no status recorded