The Patent Finder

Source Photonics, Inc.

34 patents currently held · Updated Nov 14, 2026
8 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Aug 2031
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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 Dec 16, 2026
    The maintenance fee for A Method and Algorithm for Stabilizing the Output State of an Optical Transceiver (US 9,059,834) comes due Dec 16, 2026. Unpaid by Jun 16, 2027, it lapses early.
  • 1 fee due Apr 20, 2027
    The maintenance fee for Apparatuses for Reducing the Sensitivity of an Optical Signal to Polarization and Methods of Making and Using the Same (US 9,164,247) comes due Apr 20, 2027. Unpaid by Oct 20, 2027, it lapses early.
  • 1 fee due May 24, 2027
    The maintenance fee for Bi-Directional Fiber Optic Transceivers, Housings Therefor, and Methods for Making and Using the Same (US 9,195,015) comes due May 24, 2027. Unpaid by Nov 24, 2027, it lapses early.
  • 2 fees due Jun 1 to 15, 2027 · next Jun 1
  • 2 fees due Aug 2, 2027

Which patents, and when each one lapses · Pro

Recent changes

  • 1 of the patents on this record was 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 9,568,680Optical Receiver With Reduced Cavity Size and Methods of Making and Using the Same
In force
 · High confidence
In forceHigh confidence
US 9,391,718Operational Status Indicators in an Optical Transceiver Using Dynamic Thresholds
In force
 · High confidence
In forceHigh confidence
US 8,929,748Tunable Dense Wavelength Division Multiplexing Transceiver, Circuits and Devices Therefor, and Methods for Making and Using Such Transceivers, Circuits and Devices
In force
 · High confidence
In forceHigh confidence
US 8,989,587Operational State Information Generation in an Optical Transceiver
In force
 · High confidence
In forceHigh confidence
US 8,879,909Circuits and Methods for Monitoring Power Parameters in an Optical Transceiver
In force
 · High confidence
In forceHigh confidence
US 8,901,474Enhanced Received Signal Power Indicators for Optical Receivers and Transceivers, and Methods of Making and Using the Same
In force
 · High confidence
In forceHigh confidence
US 8,903,254Low Power Consumption, Long Range, Pluggable Transceiver, Circuits and Devices Therefor, and Method(s) of Using the Same
In force
 · High confidence
In forceHigh confidence
US 8,931,966Triplexer And/Or Optical Line Terminal Compatible with a 10G Ethernet Passive Optical Network and a Housing Therefor
In force
 · High confidence
In forceHigh confidence
US 8,948,610Data Signal Threshold Detection and/or Recovery in Optical and/or Optoelectronic Receivers and/or Transceivers
In force
 · High confidence
In forceHigh confidence
US 8,934,779Operational Status Indicators in an Optical Transceiver Using Dynamic Thresholds
In force
 · High confidence
In forceHigh confidence
10 of 34 patents shown.
Pro members see all 34.
Pro members: see all 34 patents
Also on record, not counted in the 34: 8 patents in force now held by others · 1 lapsed for an unpaid fee · 3 ended at full term · 2 surrendered on reissue. 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 abandoned

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