69 results
8-K
EX-99.1
CLIR
ClearSign Technologies Corp
28 May 24
ClearSign Technologies Corporation Provides First Quarter 2024 Update
4:30pm
as part of the South Coast Air Quality Management District of California (SCAQMD) periodic public participation process to enhance existing BACT
8-K
EX-99.2
CLIR
ClearSign Technologies Corp
28 May 24
ClearSign Technologies Corporation Provides First Quarter 2024 Update
4:30pm
of nonattainment within the National Ambient Air Quality Standards for ozone in the greater Houston, Dallas and San Antonio regions. While the changes … acceptable plan to improve air quality in these regions. While these developments are still at the high-level planning stage between the state of Texas
8-K
EX-99.1
CLIR
ClearSign Technologies Corp
25 Apr 24
ClearSign Technologies Corporation Provides Full Year 2023 Update
5:16pm
performance has been assessed as part of the South Coast Air Quality Management District of California (SCAQMD) periodic public participation process
424B5
CLIR
ClearSign Technologies Corp
23 Apr 24
Prospectus supplement for primary offering
6:02am
with broad political input. Due to the localized effects of poor air quality, we expect these standards to continue to become more stringent … criteria air pollutants, including ground-level ozone. These regulations are enforced by state and local air quality districts as part of their compliance
424B5
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19 Apr 24
Prospectus supplement for primary offering
6:02am
424B5
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18 Mar 24
Prospectus supplement for primary offering
6:05am
8-K
EX-99.2
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1 Sep 23
ClearSign Technologies Corporation Provides Second Quarter 2023 Update
4:31pm
8-K
EX-99.2
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24 May 23
ClearSign Technologies Corporation Provides First Quarter 2023 Update
6:08am
8-K
EX-99.2
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7 Apr 23
ClearSign Technologies Corporation Provides Full Year 2022 Update
4:20pm
8-K
EX-99.2
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7 Jun 22
ClearSign Technologies Corporation Provides First Quarter 2022 Update
5:20pm
424B5
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31 May 22
Prospectus supplement for primary offering
4:43pm
424B5
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26 May 22
Prospectus supplement for primary offering
4:22pm
8-K
EX-99.2
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8 Apr 22
ClearSign Technologies Corporation Provides Full Year 2021 Update
9:20am
8-K
EX-99.2
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29 Nov 21
ClearSign Technologies Corporation Provides Third Quarter 2021 Update
4:31pm
8-K
EX-99.2
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10 Sep 21
ClearSign Technologies Corporation Provides Second Quarter 2021 Update
5:28pm