The Patent Finder

Flow Control LLC

50 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
9
Ending by 2030
Oct 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.
  • 2 fees due Nov 19 to 28, 2026 · next Nov 19
  • 1 fee due Dec 18, 2026
    The maintenance fee for Low profile pump with the ability to be mounted in various configurations (US 10,323,646) comes due Dec 18, 2026. Unpaid by Jun 21, 2027, it lapses early.
  • 1 fee due Mar 17, 2027
    The maintenance fee for Shower Drain Box (US 10,415,228) comes due Mar 17, 2027. Unpaid by Sep 17, 2027, it lapses early.
  • 2 fees due Apr 6 to 8, 2027 · next Apr 6
  • 2 fees due Jun 5 to 24, 2027 · next Jun 5
  • 1 fee due Jul 23, 2027
    The maintenance fee for Battery operated small craft bilge pump (US 11,878,770) comes due Jul 23, 2027. Unpaid by Jan 24, 2028, it lapses early.
  • 1 fee due Aug 13, 2027
    The maintenance fee for Diaphragm pump utilizing duckbill valves, multi-directional ports and flexible electrical connectivity (US 11,898,548) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
  • 1 fee due Oct 26, 2027
    The maintenance fee for Methodology to define optimal sun position using the capability provided by smart phone technology (US 9,325,364) comes due Oct 26, 2027. Unpaid by Apr 26, 2028, it lapses early.

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 D692,025Hand-held, rechargeable, battery powered diaphragm pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D693,371Pool cover pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D698,369Diaphragm pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D701,246Low profile pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US 10,221,954Check Valve with Plastic Lip Seal
In force
 · Medium confidence
In forceMedium confidence
US D708,648Utility pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D712,933Diaphragm pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D735,240Low profile pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US D752,110Low profile pump
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,894,389Rechargeable battery powered utility pump with series centrifugal pump configuration
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 50 patents shown.
Pro members see all 50.
Pro members: see all 50 patents

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 · 11 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