Snell Limited
13 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.
5
Ending by 2030
Oct 2028
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 Nov 26, 2026The maintenance fee for Minimizing Bandwidth Narrowing Penalities in a Wavelength Selective Switch Optical Network (US 9,042,729) comes due Nov 26, 2026. Unpaid by May 26, 2027, it lapses early.
- 1 fee due Dec 9, 2026The maintenance fee for Management, Monitoring and Performance Optimization of Optical Networks (US 9,054,832) comes due Dec 9, 2026. Unpaid by Jun 9, 2027, it lapses early.
- 1 fee due Oct 21, 2027The maintenance fee for Optical Subchannel Routing, Protection Switching and Security (US 10,630,418) comes due Oct 21, 2027. Unpaid by Apr 21, 2028, it lapses early.
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.
Showing 1 to 8 of 8
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,139,476 | Optical Ring Networks Using Circulating Optical Probe in Protection Switching with Automatic Reversion In force (reinstated) · High confidence | In force (reinstated) | High confidence | |
| US 7,773,883 | Single-Fiber Optical Ring Networks Based on Optical Double Sideband Modulation In force · High confidence | In force | High confidence | |
| US 8,175,458 | Optical Ring Networks Having Node-To-Node Optical Communication Channels for Carrying Data Traffic In force (reinstated) · Medium confidence | In force (reinstated) | Medium confidence | |
| US 10,630,418 | Optical Subchannel Routing, Protection Switching and Security In force · Low confidence | In force | Low confidence | |
| US 10,972,209 | Subchannel Photonic Routing, Switching and Protection with Simplified Upgrades of WDM Optical Networks In force · Low confidence | In force | Low confidence | |
| US 9,042,729 | Minimizing Bandwidth Narrowing Penalities in a Wavelength Selective Switch Optical Network In force · Low confidence | In force | Low confidence | |
| US 9,485,050 | Subchannel Photonic Routing, Switching and Protection with Simplified Upgrades of WDM Optical Networks In force · Medium confidence | In force | Medium confidence | |
| US 9,054,832 | Management, Monitoring and Performance Optimization of Optical Networks In force · High confidence | In force | High confidence |
Also on record, not counted in the 8: 13 patents in force now held by others · 64 lapsed for an unpaid fee · 25 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.
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 abandoned · 11 no status recorded