Gypsum panel containing ammonium-exchanged vermiculite and methods
US-12448328-B2 · Oct 21, 2025 · US
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Hemphill Mark patents
Hemphill Mark is listed as an inventor on 23 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Hemphill Mark |
| Total patents | 23 |
| First publication | Nov 7, 2019 |
| Latest publication | Oct 21, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Open-celled gypsum core, gypsum acoustic panel, and method for making same
US-12304871-B2 · May 20, 2025 · US
High salt gypsum wallboard containing salt absorbents and methods of making same
US-11999658-B2 · Jun 4, 2024 · US
Gypsum slurry mixer process for enhanced wallboard strength
US-2023406781-A1 · Dec 21, 2023 · US
Gypsum set accelerator
US-2023339811-A1 · Oct 26, 2023 · US
Flour binder for gypsum board, and related methods, product, and slurries
US-11787739-B2 · Oct 17, 2023 · US
Methods of removing chloride from gypsum having high level of chloride salt
US-11760689-B2 · Sep 19, 2023 · US
Gypsum panel containing ammonium-exchanged vermiculite and methods
US-2023250019-A1 · Aug 10, 2023 · US
Gypsum wallboard with enhanced fire resistance, and related coatings and methods
US-11702373-B2 · Jul 18, 2023 · US
High salt gypsum wallboard containing salt absorbents and methods of making same
US-2023150879-A1 · May 18, 2023 · US
Recent patents
Latest publications not already listed above.
High temperature sag resistant lightweight gypsum board
US-2022356114-A1 · Nov 10, 2022 · US
Methods of removing chloride from gypsum having high level of chloride salt
US-2022324756-A1 · Oct 13, 2022 · US
Open-celled gypsum core, gypsum acoustic panel, and method for making same
US-2022220039-A1 · Jul 14, 2022 · US
Gypsum board from gypsum having high level of chloride salt and a perforated sheet and methods associated therewith
US-11186066-B2 · Nov 30, 2021 · US
Gypsum board from gypsum having high level of chloride salt and a starch layer and methods associated therewith
US-11186067-B2 · Nov 30, 2021 · US
Composite gypsum board and related methods
US-11046053-B2 · Jun 29, 2021 · US
Flour binder for gypsum board, and related methods, product, and slurries
US-2021155543-A1 · May 27, 2021 · US
Methods for making high sound transmission class gypsum boards and gypsum boards made by the method
US-11002010-B2 · May 11, 2021 · US
Gypsum wallboard with enhanced fire resistance, and related coatings and methods
US-2020392050-A1 · Dec 17, 2020 · US
Composite gypsum board and related methods
US-2020262180-A1 · Aug 20, 2020 · US
Gypsum board from gypsum having high level of chloride salt and a perforated sheet and methods associated therewith
US-2020055277-A1 · Feb 20, 2020 · US
Gypsum board from gypsum having high level of chloride salt and a starch layer and methods associated therewith
US-2020055278-A1 · Feb 20, 2020 · US
Methods for making high sound transmission class gypsum boards and gypsum boards made by the method
US-2019338516-A1 · Nov 7, 2019 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| United States Gypsum Co | 17 |
| Knauf Gips Kg | 6 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C04B2111/0062 | 23 |
| C04B28/14 | 15 |
| B32B13/08 | 14 |
| E04C2/043 | 12 |
| B32B2607/00 | 12 |