The Patent Finder

Masterspas, LLC

16 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2
Ending by 2030
Dec 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 Nov 26, 2026
    The maintenance fee for Swim spa with plenum arrangement at head end (US 9,038,208) comes due Nov 26, 2026. Unpaid by May 26, 2027, it lapses early.
  • 1 fee due Jan 11, 2027
    The maintenance fee for Filter assembly having an outer filter element and an inner filter element removably installed within the outer filter element (US 11,697,945) comes due Jan 11, 2027. Unpaid by Jul 12, 2027, it lapses early.
  • 1 fee due May 21, 2027
    The maintenance fee for Rolling cover for a spa (US 11,821,231) comes due May 21, 2027. Unpaid by Nov 22, 2027, it lapses early.
  • 1 fee due Oct 7, 2027
    The maintenance fee for Filter assembly having an outer filter element and an inner filter element removably installed within the outer filter element (US 10,612,258) comes due Oct 7, 2027. Unpaid by Apr 7, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

  • 2 of the patents on this record were granted 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 9,428,928Swim spa with plenum arrangement at head end
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,995,049Swim spa with plenum arrangement at head end
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,038,208Swim spa with plenum arrangement at head end
In force
 · From the USPTO record
In forceFrom the USPTO record
US D835,233Filter
In force
 · From the USPTO record
In forceFrom the USPTO record
US D855,755Filter
In force
 · From the USPTO record
In forceFrom the USPTO record
US D880,656Inner filter element
In force
 · From the USPTO record
In forceFrom the USPTO record
US D881,339Outer filter element
In force
 · From the USPTO record
In forceFrom the USPTO record
US D904,560Inner filter element
In force
 · From the USPTO record
In forceFrom the USPTO record
US D916,238Outer filter element
In force
 · From the USPTO record
In forceFrom the USPTO record
US 10,612,258Filter assembly having an outer filter element and an inner filter element removably installed within the outer filter element
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 16 patents shown.
Pro members see all 16.
Pro members: see all 16 patents
Also on record, not counted in the 16: 3 lapsed for an unpaid fee · 2 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 · 2 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