The Patent Finder
US

Charged Particle Beam Writing Apparatus, Method of Adjusting Beam Incident Angle to Target Object Surface, and Charged Particle Beam Writing Method

US 9,236,223 In force
OverviewFamilyAssignmentsSources & methods

Term ends Jan 15, 2034 · High confidence

Filed Jan 15, 2014 as application 14/155,604 · Granted Jan 12, 2016
Base term, 20 years from filing
Today
20 years from filing
2014 2034
Clock starts
Jan 15, 2014
Term ends
Jan 15, 2034
Granted
Jan 12, 2016
base term fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term is its 20-year base term, with no adjustment for prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Jan 15, 2014, when this application, 14/155,604, was filedJan 15, 2034High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderJan 15, 2034High confidence

This family

US 9,236,223this patent
Jan 2034
Jan 2034
US 9,824,849In force
Jan 2034
Jan 2034
US 10,192,712In force
Jan 2034
Jan 2034
US 11,145,483In force
Jan 2034
Jan 2034
The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Jan 15, 2014
Reel 31973, frame 646
Nakayama, Takahito; Touya, TakanaoNuflare Technology, Inc.Assignment of Assignor's Interest

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

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