Method and apparatus for making a gypsum board
US-12558811-B2 · Feb 24, 2026 · US
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Hemphill Mark K patents
Hemphill Mark K is listed as an inventor on 20 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Hemphill Mark K |
| Total patents | 20 |
| First publication | Mar 28, 2019 |
| Latest publication | Feb 24, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
High temperature sag resistant gypsum panel
US-12448334-B2 · Oct 21, 2025 · US
Board with fiber-reinforced dense layer
US-12415765-B2 · Sep 16, 2025 · US
Method and apparatus for making a gypsum board
US-2025018601-A1 · Jan 16, 2025 · US
Coated gypsum set stabilizing particles having a hydrophobic gypsum core, gypsum board including same, process for making the particles, and process for making the gypsum board
US-2024182363-A1 · Jun 6, 2024 · US
Method of preparing gypsum wallboard from high salt gypsum, and related product
US-11993054-B2 · May 28, 2024 · US
Gypsum board containing high absorption paper and related methods
US-11891336-B2 · Feb 6, 2024 · US
Method and apparatus for making a gypsum board
US-2024033972-A1 · Feb 1, 2024 · US
Fire resistant gypsum board and related methods
US-11834375-B2 · Dec 5, 2023 · US
Accelerator comprising starch, and related board, slurries, and methods
US-11834374-B2 · Dec 5, 2023 · US
Recent patents
Latest publications not already listed above.
High temperature sag resistant gypsum panel
US-2023045576-A1 · Feb 9, 2023 · US
Board with fiber-reinforced dense layer
US-2023021340-A1 · Jan 26, 2023 · US
Compositions and methods for making paper using uncooked starch for gypsum panels
US-2023002974-A1 · Jan 5, 2023 · US
Fire resistant gypsum board and related methods
US-2021238096-A1 · Aug 5, 2021 · US
Composite gypsum board formed from high-salt stucco and related methods
US-2021198148-A1 · Jul 1, 2021 · US
Gypsum board containing high absorption paper and related methods
US-2021155545-A1 · May 27, 2021 · US
Method of preparing gypsum wallboard from high salt gypsum, and related product
US-2021129490-A1 · May 6, 2021 · US
Siloxane polymerization in gypsum wallboard
US-2020024191-A1 · Jan 23, 2020 · US
Accelerator comprising starch, and related board, slurries, and methods
US-2019322584-A1 · Oct 24, 2019 · US
Migrating starch with high cold-water solubility for use in preparing gypsum board
US-2019092689-A1 · Mar 28, 2019 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| United States Gypsum Co | 15 |
| Knauf Gips Kg | 5 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C04B2111/0062 | 20 |
| C04B28/14 | 19 |
| B32B2607/00 | 11 |
| C04B28/145 | 10 |
| E04C2/043 | 10 |