The Patent Finder

TC Lab, Inc.

26 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Jan 2035
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 19, 2027
    The maintenance fee for 3D memory array clusters and resulting memory architecture (US 11,763,872) comes due Mar 19, 2027. Unpaid by Sep 20, 2027, it lapses early.
  • 1 fee due Apr 29, 2027
    The maintenance fee for Methods of reading and writing data in a thyristor random access memory (US 10,460,789) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
  • 2 fees due Jul 7 to 14, 2027 · next Jul 7
  • 3 fees due Aug 4 to 25, 2027 · next Aug 4
  • 1 fee due Oct 28, 2027
    The maintenance fee for 3D stacked high-density memory cell arrays and methods of manufacture (US 10,636,473) comes due Oct 28, 2027. Unpaid by Apr 28, 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 9,564,199Methods of Reading and Writing Data in a Thyristor Random Access Memory
In force
 · High confidence
In forceHigh confidence
US 9,899,389Two-Transistor SRAM Semiconductor Structure and Methods of Fabrication
In force
 · High confidence
In forceHigh confidence
US 10,020,043Methods of Reading and Writing Data in a Thyristor Random Access Memory
In force
 · High confidence
In forceHigh confidence
US 10,460,789Methods of reading and writing data in a thyristor random access memory
In force
 · From the USPTO record
In forceFrom the USPTO record
US 10,529,718Thyristor volatile random access memory and methods of manufacture
In force
 · From the USPTO record
In forceFrom the USPTO record
US 10,553,588Thyristor volatile random access memory and methods of manufacture
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,842,639Systems and Methods for Managing Read Voltages in a Cross-Point Memory Array
In force
 · High confidence
In forceHigh confidence
US 10,032,500Memory Disturb Recovery Scheme for Cross-Point Memory Arrays
In force
 · High confidence
In forceHigh confidence
US 9,899,390Methods and Systems for Reducing Electrical Disturb Effects Between Thyristor Memory Cells Using Heterostructured Cathodes
In force
 · High confidence
In forceHigh confidence
US 10,535,657High Density Vertical Thyristor Memory Cell Array with Improved Isolation
In force
 · High confidence
In forceHigh confidence
10 of 26 patents shown.
Pro members see all 26.
Pro members: see all 26 patents
Also on record, not counted in the 26: 24 lapsed for an unpaid fee. 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.

4 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