High temperature heater lamp
US-11477855-B2 · Oct 18, 2022 · US
Envelopes; Vessels
Envelopes; Vessels · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01K1/28 |
| Official title | Envelopes; Vessels |
| Display label | Envelopes; Vessels |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High temperature heater lamp
US-2021400773-A1 · Dec 23, 2021 · US
High temperature heater lamp
US-11116043-B2 · Sep 7, 2021 · US
High temperature heater lamp
US-2021176827-A1 · Jun 10, 2021 · US
Infrared device
US-10937643-B2 · Mar 2, 2021 · US
Infrared device
US-2020234942-A1 · Jul 23, 2020 · US
Light-emitting device and light source apparatus
US-10651027-B2 · May 12, 2020 · US
Light-emitting device and light source apparatus
US-2020020519-A1 · Jan 16, 2020 · US
Filament bulb with uniform luminance
US-10473291-B2 · Nov 12, 2019 · US
Low-pressure ultraviolet radiator with multiple filaments
US-10332738-B2 · Jun 25, 2019 · US
Tungsten-halogen electromagnetic radiation optical systems source
US-10274366-B2 · Apr 30, 2019 · US
Low-pressure ultraviolet radiator with multiple filaments
US-2019066996-A1 · Feb 28, 2019 · US
Filament bulb with uniform luminance
US-2018306407-A1 · Oct 25, 2018 · US
Incandescent lamp
US-9934955-B2 · Apr 3, 2018 · US
Filament unit for retrofit led tube
US-2018023770-A1 · Jan 25, 2018 · US
Vibration resistant automotive front lighting lamp
US-9805926-B2 · Oct 31, 2017 · US
Incandescent lamp
US-2017250067-A1 · Aug 31, 2017 · US
Liquid filament for incandescent lights
US-9723702-B2 · Aug 1, 2017 · US
Tungsten-halogen electromagnetic radiation optical systems source
US-2017052067-A1 · Feb 23, 2017 · US
Liquid filament for incandescent lights
US-2017042006-A1 · Feb 9, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01K1/28?
- CPC H01K1/28 is the Cooperative Patent Classification code for “Envelopes; Vessels.”
- How many patents are filed under CPC H01K1/28 (Envelopes; Vessels)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC H01K1/28 growing?
- Publication counts under this code: 4 in 2021 vs 1 in 2022 (latest complete years).