Pfeiffer Vacuum

62 patents currently held · Updated Nov 15, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Dec 2028

Next term end

When these terms end

5 yrs10 yrs20 yrs

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 6, 2026
The maintenance fee for Vacuum device (US 11,668,305) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
1 fee due Feb 15, 2027
The maintenance fee for Dry-type primary vacuum pump and method for controlling the injection of a purging gas (US 11,725,659) comes due Feb 15, 2027. Unpaid by Aug 16, 2027, it lapses early.
1 fee due Mar 26, 2027
The maintenance fee for Station and method for measuring airborne molecular contamination (US 11,768,134) comes due Mar 26, 2027. Unpaid by Sep 27, 2027, it lapses early.
2 fees due Apr 1 to 3, 2027 · next Apr 1
4 fees due May 3 to 19, 2027 · next May 3
1 fee due Jul 28, 2027
The maintenance fee for Dry roughing vacuum pump (US 10,544,809) comes due Jul 28, 2027. Unpaid by Jan 28, 2028, it lapses early.
1 fee due Aug 18, 2027
The maintenance fee for Membrane vacuum pump (US 10,563,648) comes due Aug 18, 2027. Unpaid by Feb 18, 2028, it lapses early.
2 fees due Sep 3, 2027
2 fees due Oct 9 to 28, 2027 · next Oct 9

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted 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 7,790,479	Method and Device for Monitoring the Contamination of Substrate Wafers In force Term ends Dec 21, 2028 · High confidence	In force	Term ends Dec 21, 2028	High confidence
US 8,151,816	Method and Device for Removing Pollution from a Confined Environment In force Term ends Jan 8, 2029 · High confidence	In force	Term ends Jan 8, 2029	High confidence
US 7,854,601	Lubricant-tight vane rotary vacuum pump In force Term ends Feb 11, 2029 · From the USPTO record	In force	Term ends Feb 11, 2029	From the USPTO record
US 8,462,335	System for Analyzing a Low-Pressure Gas by Optical Emission Spectroscopy In force Term ends Apr 16, 2029 · High confidence	In force	Term ends Apr 16, 2029	High confidence
US 8,383,296	Method for Manufacturing Photomasks and Device for Its Implementation In force Term ends Apr 27, 2029 · High confidence	In force	Term ends Apr 27, 2029	High confidence
US 8,356,526	Contamination Measurement Station and Method for a Semiconductor Substrates Transport Pod In force Term ends Jun 29, 2029 · High confidence	In force	Term ends Jun 29, 2029	High confidence
US 8,465,269	Dry Vacuum Pump Including a Lubricating Fluid Sealing Device and a Centrifuge Element Equipping Such a Device In force Term ends Jan 19, 2030 · High confidence	In force	Term ends Jan 19, 2030	High confidence
US 8,803,104	Ionization cell for a mass spectrometer, and corresponding leak detector In force Term ends Mar 10, 2030 · From the USPTO record	In force	Term ends Mar 10, 2030	From the USPTO record
US 8,898,930	Method for Treating a Transport Support for the Conveyance and Atmospheric Storage of Semiconductor Substrates, and Treatment Station for the Implementation of Such a Method In force Term ends Apr 28, 2030 · High confidence	In force	Term ends Apr 28, 2030	High confidence
US 8,700,346	Device for measuring and processing a high dynamic input signal, and corresponding leak detector and measuring and processing method In force Term ends Feb 19, 2031 · From the USPTO record	In force	Term ends Feb 19, 2031	From the USPTO record

10 of 62 patents shown.

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Pro members: see all 62 patents

Also on record, not counted in the 62: 43 lapsed for an unpaid fee · 11 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.

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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.

2 pending · 1 abandoned · 22 no status recorded

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