The Patent Finder

Danco, Inc.

74 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
16
Ending by 2030
Jan 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 Dec 9, 2026
    The maintenance fee for Universal Trim Kit (US 9,051,720) comes due Dec 9, 2026. Unpaid by Jun 9, 2027, it lapses early.
  • 1 fee due Mar 17, 2027
    The maintenance fee for Seals for Closet Collars (US 10,415,224) comes due Mar 17, 2027. Unpaid by Sep 17, 2027, it lapses early.
  • 1 fee due Apr 22, 2027
    The maintenance fee for Smart Water Filter System (US 10,450,203) comes due Apr 22, 2027. Unpaid by Oct 22, 2027, it lapses early.
  • 2 fees due May 10 to 12, 2027 · next May 10
  • 1 fee due Jun 30, 2027
    The maintenance fee for External Hair Strainer (US 10,519,638) comes due Jun 30, 2027. Unpaid by Jan 3, 2028, it lapses early.
  • 3 fees due Jul 2 to 5, 2027 · next Jul 2
  • 2 fees due Aug 18 to 23, 2027 · next Aug 18
  • 3 fees due Sep 1 to 12, 2027 · next Sep 1

Which patents, and when each one lapses · Pro

Recent changes

  • 1 of the patents on this record was granted since Aug 16, 2026
  • 2 terms have ended since Aug 16, 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.
PatentTitleStatus Expires Confidence
US D674,877Swivel Aerator
In force
 · High confidence
In forceHigh confidence
US D674,878Universal Aerator
In force
 · High confidence
In forceHigh confidence
US D676,525Swivel Aerator
In force
 · High confidence
In forceHigh confidence
US 8,813,775Toilet Fill Valve with Valve Lock
In force
 · High confidence
In forceHigh confidence
US 11,091,902Toilet Fill Valve with Valve Lock
In force
 · Medium confidence
In forceMedium confidence
US 8,333,215Toilet Fill Valve with Valve Lock
In force
 · High confidence
In forceHigh confidence
US 9,447,568Toilet Fill Valve with Valve Lock
In force
 · High confidence
In forceHigh confidence
US D693,427Filter Aerator
In force
 · High confidence
In forceHigh confidence
US 10,597,855Toilet fill valve with valve lock
In force
 · From the USPTO record
In forceFrom the USPTO record
US 12,442,169Toilet Fill Valve with Valve Lock
In force
 · Medium confidence
In forceMedium confidence
10 of 74 patents shown.
Pro members see all 74.
Pro members: see all 74 patents
Also on record, not counted in the 74: 2 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.

3 pending · 1 abandoned · 8 no status recorded

List them

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited