Patent Assignment Assignor Details
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For pending or abandoned applications please consult USPTO staff.
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Assignor Name :
HEPWORTH MINERALS AND CHEMICALS, INC. (F/K/A HEPWORTH INDUSTRIAL SAND, INC.)
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Total Assignments:
3
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Assignment:
1
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| Reel/Frame: | 005828/0571 | |
| Pages: | 4 |
| | Recorded: | 09/09/1991 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Assignee
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| 11830 RAVENNA ROAD |
| CHARDON, OHIO 44024 |
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Pat #
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Pub #
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Intl #
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App #
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NONE
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06854943
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Correspondence name and address
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CALFEE, HALTER & GRISWOLD
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1800 SOCIETY BUILDING
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EAST NINTH & SUPERIOR
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CLEVELAND, OH 44114-2688
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Assignment:
2
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| Reel/Frame: | 005828/0575 | |
| Pages: | 4 |
| | Recorded: | 09/09/1991 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Assignee
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| 11830 RAVENNA ROAD |
| CHARDON, OHIO 44024 |
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Pat #
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Pub #
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Intl #
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App #
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NONE
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06437431
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Correspondence name and address
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CALFEE, HALTER & GRISWOLD
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1800 SOCIETY BUILDING
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EAST NINTH & SUPERIOR
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CLEVELAND, OH 44114-2688
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Assignment:
3
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| Reel/Frame: | 005828/0583 | |
| Pages: | 4 |
| | Recorded: | 09/09/1991 | | |
| Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Assignee
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| 11830 RAVENNA ROAD |
| CHARDON, OHIO 44024 |
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Pat #
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Pub #
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Intl #
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App #
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NONE
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06626754
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Correspondence name and address
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CALFEE, HALTER & GRISWOLD
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1800 SOCIETY BUILDING
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EAST NINTH & SUPERIOR
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CLEVELAND, OH 44114-2688
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06/27/2025 07:20 PM
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