Imerys USA, Inc.
8 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.
7
Ending by 2030
Jun 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 Nov 30, 2026The maintenance fee for Flame-Retardant Polymer Composition (US 11,661,497) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
- 1 fee due Dec 6, 2026The maintenance fee for Reactive Carbonate for Elastomeric Articles (US 11,667,732) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
- 1 fee due Mar 22, 2027The maintenance fee for Method for improvement of casting quality (US 9,138,803) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
- 1 fee due Apr 10, 2027The maintenance fee for Production of Foundry Premix Composition (US 11,780,782) comes due Apr 10, 2027. Unpaid by Oct 12, 2027, it lapses early.
- 1 fee due May 7, 2027The maintenance fee for Acid-treated filter aid blend (US 11,806,690) comes due May 7, 2027. Unpaid by Nov 8, 2027, it lapses early.
- 3 fees due Jun 12 to 30, 2027 · next Jun 12
- 2 fees due Jul 14, 2027
- 1 fee due Aug 11, 2027The maintenance fee for Co-agglomerated composite materials (US 10,556,221) comes due Aug 11, 2027. Unpaid by Feb 11, 2028, it lapses early.
- 1 fee due Oct 19, 2027The maintenance fee for Product comprising ultrafine natural glass (US 9,315,641) comes due Oct 19, 2027. Unpaid by Apr 19, 2028, it lapses early.
- 1 fee due Nov 5, 2027The maintenance fee for Methods for operating a furnace (US 10,641,482) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
- 1 term has 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 7,727,324 | Compositions comprising kaolin having nanosize dimensions In force · From the USPTO record | In force | From the USPTO record | |
| US 8,728,573 | Metal compound coated particulate mineral materials, methods of making them and uses thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 9,447,531 | Process for producing nonwoven fabric In force · From the USPTO record | In force | From the USPTO record | |
| US 10,641,482 | Methods for operating a furnace In force · From the USPTO record | In force | From the USPTO record | |
| US 9,834,684 | Natural amorphous silica filler products In force · From the USPTO record | In force | From the USPTO record | |
| US 8,580,141 | Stearic acid-treated calcium carbonate compositions having low or no detectable free stearic acid and related methods In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 9,840,434 | Product comprising ultrafine natural glass In force · From the USPTO record | In force | From the USPTO record | |
| US 8,196,533 | Methods for operating a fluidized-bed reactor In force · From the USPTO record | In force | From the USPTO record | |
| US 8,242,050 | Composite filter aids having novel pore size characteristics In force · From the USPTO record | In force | From the USPTO record | |
| US 9,315,641 | Product comprising ultrafine natural glass In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 46: 8 patents in force now held by others · 19 lapsed for an unpaid fee · 32 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.
1 pending · 5 abandoned · 33 no status recorded