Self-closing drain plugs with redundant sealing
US-10094514-B1 · Oct 9, 2018 · US
Conduits; Junctions (in general F16L); Fittings for lubrication apertures
Conduits; Junctions (in general F16L); Fittings for lubrication apertures · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16N21/00 |
| Official title | Conduits; Junctions (in general F16L); Fittings for lubrication apertures |
| Display label | Conduits; Junctions (in general F16L); Fittings for lubrication apertures |
| Total patents | 138 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 16 |
| 2017 | 17 |
| 2018 | 16 |
| 2019 | 12 |
| 2020 | 13 |
| 2021 | 4 |
| 2022 | 10 |
| 2023 | 11 |
| 2024 | 15 |
| 2025 | 9 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Arrangement for transferring fluid to guide bar of chain saw
US-2018272554-A1 · Sep 27, 2018 · US
Cooling structure for bearing device
US-10072710-B2 · Sep 11, 2018 · US
Threaded Fitting for tube
US-2018224043-A1 · Aug 9, 2018 · US
Oil lubrication system of transmission case
US-2018163846-A1 · Jun 14, 2018 · US
Device for transferring oil between two repositories rotating relative to each other, and propeller turbomachine for an aircraft with such a device
US-9995176-B2 · Jun 12, 2018 · US
Hydraulic and electrical interface ring for a turbine engine
US-9988937-B2 · Jun 5, 2018 · US
Vent valve
US-2018142835-A1 · May 24, 2018 · US
Reservoir overfill protection
US-2018142796-A1 · May 24, 2018 · US
Seals separated by retaining clip
US-2018112776-A1 · Apr 26, 2018 · US
Autofill shutoff valve
US-2018112821-A1 · Apr 26, 2018 · US
Centerfill of lubricant reservoir
US-2018100620-A1 · Apr 12, 2018 · US
Lubricant reservoir low level indicator
US-9920879-B2 · Mar 20, 2018 · US
Oil cooler
US-9897397-B2 · Feb 20, 2018 · US
Handheld work apparatus
US-9855672-B2 · Jan 2, 2018 · US
Supply device for viscous media
US-9855574-B2 · Jan 2, 2018 · US
Structure for attaching oil jet valve
US-9822676-B2 · Nov 21, 2017 · US
Cooled minimum quantity lubrication for machining
US-9803801-B2 · Oct 31, 2017 · US
Vacuum processing system, vacuum processing device, lubricating agent supply device, and lubricating agent supplying method
US-9784317-B2 · Oct 10, 2017 · US
Housing for a device for the metered distribution of a medium, and metering device for use in the housing
US-2017276532-A1 · Sep 28, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16N21/00?
- CPC F16N21/00 is the Cooperative Patent Classification code for “Conduits; Junctions (in general F16L); Fittings for lubrication apertures.”
- How many patents are filed under CPC F16N21/00 (Conduits; Junctions (in general F16L); Fittings for lubrication apertures)?
- Our database includes 138 publications tagged with this CPC code.
- Is patent activity under CPC F16N21/00 growing?
- Publication counts under this code: 15 in 2024 vs 9 in 2025 (latest complete years).