Also listed on Contech Construction Products Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Dec 8, 2016 (Wells Fargo Bank, National Association).
Term ends Feb 20, 2030 · High confidence
20-year base term ends Sep 10, 2029
Held by Contech Engineered Solutions LLC
Filed Sep 10, 2009 as application 12/556,728 · Granted Apr 3, 2012
Base term plus 163 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Sep 10, 2009
Sep 10, 2009
Term ends
Feb 20, 2030
Feb 20, 2030
Granted
Apr 3, 2012
Apr 3, 2012
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
163
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 163 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 10, 2009, when this application, 12/556,728, was filed | Sep 10, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +163 days, USPTO patent term adjustment record | Feb 20, 2030 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 20, 2030 | High confidence |
This family
| Application 61/096,144 | Provisional application no patent term | no patent term |
| US 8,147,688 | this patent Feb 2030 | Feb 2030 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 21, 2009 Reel 23403, frame 829 | Adams, David R.; Aberle, Daniel W.; Cobb, Daniel P.; Byrne, Gregory W. | Contech Construction Products Inc. | Assignment of Assignor's Interest |
| Feb 1, 2012 Reel 27633, frame 262 | Contech Construction Products Inc. | Contech Engineered Solutions LLC | Certificate of Conversion |
| Feb 21, 2012 Reel 28014, frame 952 | Contech Engineered Solutions LLC; Contech Bridge Solutions LLC; Contech Stormwater Solutions LLC; Keystone Retaining Wall Systems LLC; CDS Technologies LLC; Contech Earth Stabilization Solutions LLC | Wells Fargo Capital Finance, LLC | Security Interest |
| Jun 18, 2013 Reel 30634, frame 40 | Keystone Retaining Wall Systems LLC; Contech Engineered Solutions LLC; Imbrium Systems LLC | Goldman Sachs Lending Partners LLC | Notice of Grant of Security Interest in Patents |
| Nov 30, 2016 Reel 40741, frame 458 | Goldman Sachs Lending Partners, LLC | Contech Technologies, Inc. | Release of Security Interest |
| Dec 2, 2016 Reel 40796, frame 939 | Goldman Sachs Lending Partners, LLC | Contech Engineered Solutions, LLC | Release of Security Interest |
| Dec 2, 2016 Reel 40797, frame 343 | Wells Fargo Capital Finance, LLC | Contech Engineered Solutions, LLC | Release of Security Interest |
| Dec 8, 2016 Reel 40852, frame 262 | Contech Engineered Solutions Inc. | Wells Fargo Bank, National Association, as Agent | Security Interest |
| Feb 10, 2025 Reel 70170, frame 919 | Best Block, LLC; Contech Engineered Solutions LLC; Custom Building Products, LLC; Forterra Concrete Products, LLC; Forterra Pipe & Precast, LLC; Keystone Retaining Wall Systems LLC; Pavestone, LLC; The Quikrete Companies, LLC; United States Pipe and Foundry Company, LLC; Usp Holdings, LLC | U.S. Bank Trust Company, National Association | Patent Security Agreement |
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.
What's changing
Feb 2030
Term ends Feb 20, 2030. No further fees fall due before then
Note
The 163 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
53
later US patents cite this one
That is top 25% of utility patents granted in 2012 in our data, the only group it is compared against.
How we rank
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.