Keystone Retaining Wall Systems LLC
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 5 name spellings.
37
Ending by 2030
Nov 2026
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 25, 2026The maintenance fee for Twisted Block (US 10,329,717) comes due Dec 25, 2026. Unpaid by Jun 25, 2027, it lapses early.
- 1 fee due Jan 2, 2027The maintenance fee for Blocks, Block Systems and Methods of Making Blocks (US 10,337,163) comes due Jan 2, 2027. Unpaid by Jul 2, 2027, it lapses early.
- 1 fee due Feb 6, 2027The maintenance fee for Patio Blocks and Block Systems with Side Surface Positioning and Retaining Structures (US 10,370,859) comes due Feb 6, 2027. Unpaid by Aug 6, 2027, it lapses early.
- 1 fee due Mar 24, 2027The maintenance fee for Blocks and Block Connectors, Block Systems and Methods of Making Blocks (US 10,422,101) comes due Mar 24, 2027. Unpaid by Sep 24, 2027, it lapses early.
- 1 fee due May 10, 2027The maintenance fee for Multi-Textured or Patterned Exposed Surface of a Landscaping Block, Wall Block, Patio Block and Block System (US 9,181,714) comes due May 10, 2027. Unpaid by Nov 10, 2027, it lapses early.
- 1 fee due Jun 30, 2027The maintenance fee for Retaining Wall Containing Wall Blocks with Weight Bearing Pads (US 10,519,656) comes due Jun 30, 2027. Unpaid by Jan 3, 2028, it lapses early.
- 1 fee due Aug 23, 2027The maintenance fee for Slant Wall Block and Wall Section Including Same (US 9,267,260) comes due Aug 23, 2027. Unpaid by Feb 23, 2028, it lapses early.
- 1 fee due Oct 16, 2027The maintenance fee for Block, Block System and Method of Making a Block (US 11,958,211) comes due Oct 16, 2027. Unpaid by Apr 17, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 17, 2026
- 13 terms have ended 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 D671,657 | Landscaping Block In force · High confidence | In force | High confidence | |
| US D674,118 | Landscaping Block In force · High confidence | In force | High confidence | |
| US D674,119 | Landscaping Block In force · High confidence | In force | High confidence | |
| US D674,120 | Landscaping Block In force · High confidence | In force | High confidence | |
| US D674,510 | Landscape Edger In force · High confidence | In force | High confidence | |
| US D680,233 | Landscape Edger In force · High confidence | In force | High confidence | |
| US D680,663 | Landscape Edger In force · High confidence | In force | High confidence | |
| US D680,664 | Landscape Edger In force · High confidence | In force | High confidence | |
| US D685,502 | Landscaping Block In force · High confidence | In force | High confidence | |
| US D686,346 | Landscape Stone In force · High confidence | In force | High confidence |
Also on record, not counted in the 93: 35 lapsed for an unpaid fee · 103 ended at full term. 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 · 31 abandoned · 3 no status recorded