The Patent Finder

Dorner MFG. Corp.

18 patents currently held · Updated Nov 15, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
4
Ending by 2030
May 2028
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 Mar 12, 2027
    The maintenance fee for Conveyor end drive with weighted take-up roller (US 11,753,251) comes due Mar 12, 2027. Unpaid by Sep 13, 2027, it lapses early.
  • 1 fee due Nov 14, 2027
    The maintenance fee for Return roller assemblies for conveyor (US 11,981,513) comes due Nov 14, 2027. Unpaid by May 15, 2028, it lapses early.

Which patents, and when each one lapses · Pro

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.
PatentTitleStatus Expires Confidence
US 7,735,638Conveyor Frame Assembly Having Side Rails Including Multiple Attachment Slots and Adjustable Cross Supports
In force
 · High confidence
In forceHigh confidence
US 7,874,419Contained Drive System for Chain Conveyor Belt to Reduce Catenary Sag
In force
 · High confidence
In forceHigh confidence
US 7,823,716Product stabilizing conveyor system and method
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,042,682Conveyor Belt Drive Sprocket Retention System
In force
 · High confidence
In forceHigh confidence
US 8,936,147Pinch Roller Drive
In force
 · High confidence
In forceHigh confidence
US 9,617,078Conveyor frame assembly with cross supports
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,469,481Carousel Conveyor Drive Module
In force
 · High confidence
In forceHigh confidence
US 9,382,076Conveying and accumulating system with product alignment wheel
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,714,144Product conveying and accumulation system
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,669,998Conveyor drive system
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 18 patents shown.
Pro members see all 18.
Pro members: see all 18 patents
Also on record, not counted in the 18: 3 lapsed for an unpaid fee · 58 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 no status recorded

List them

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited