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Lightweight Concrete Compositions

US 7,820,094 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Oct 26, 2022 on the fee record · High confidence

Third maintenance fee unpaid; grace period ended.

Filed Dec 18, 2009 as application 12/641,724 · Granted Oct 26, 2010
Base term, 20 years from filing
Today
Lapsed Oct 26, 2022
2006 2026
Clock starts
Mar 22, 2006
No longer in force
Oct 26, 2022
Granted
Oct 26, 2010
Term would have run to
Mar 22, 2026
base term after the term ends 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.
10
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

Its term would have run to Mar 22, 2026: its 20-year base term, with no adjustment for prosecution delay. 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 Mar 22, 2006, when application 11/387,198, the earliest non-provisional in its chain, was filed (this one was filed Dec 18, 2009)Mar 22, 2026High 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 paidlapsed Oct 26, 2022High confidence
Computed term endThe steps above, in orderOct 26, 2022High confidence

This family

US 7,644,548In force
no later than Dec 2027
no later than Dec 2027
US 7,632,348Lapsed on the fee record
Dec 2017
Dec 2017
US 7,658,797In force
no later than Oct 2027
no later than Oct 2027
US 7,648,574Term ended
Mar 2026
Mar 2026
US 7,699,929Surrendered on reissue
no later than Mar 2012
no later than Mar 2012
US 8,029,617Term ended
Mar 2026
Mar 2026
US 7,820,094this patent
Oct 2022
Oct 2022
US 8,357,240Term ended
Mar 2026
Mar 2026
8 of 10 applications in this family shown, earliest filings first. 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
Oct 31, 2012
Reel 29218, frame 1
Nova Chemicals Inc.Syntheon Inc.Assignment of Assignor's Interest
Feb 28, 2019
Reel 49896, frame 538
Syntheon Inc.Syntheon Holdings S.p.A.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.

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