US2970929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of coated abrasives
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1958-03-12
•
Granted: 1961-02-07
•
Expires: 1978-03-12
Abstract
No abstract record available.
Inventors
- 👤 Lester A Hansen
- 👤 James H Baker
- 👤 Edward J Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF MAKING A COATED ABRASIVE SHEET COMPRISING THE STEPS OF: DEPOSITING A FIRST OPEN COATING OF ABRASIVE GRAINS UPON A MOVING BACKING SHEET HAVING AN ADHESIVE COATING THEREON, EMBEDDING AND REDISTRIBUTING SAID ABRASIVE GRAINS IN SAID ADHESIVE COATING BY PRESSURE CONTACT OF A DRIVEN MEMBER WHOSE SURFACE IS MOVING RELATIVE TO THE CONTACTED ABRASIVE AD ADHESIVE COATING WHEREBY A SLIPPING CONTACT EFFECTIVE TO REDISTRIBUTE THE ABRASIVE GRAINS IN SAID ADHESIVE COATING IS MAINTAINED BETWEEN SAID MEMBER AND SAID COATING; AND THEREAFTER APPLYING DIRECTLY TO SAID FIRST OPEN COATING OF ABRASIVE GRAINS AND ADHESIVE A SECOND COATING OF ABRASIVE GRAINS, SAID SECOND COATING OF GRAINS BEING DEPOSITED WITH THE LONG AXIS OF THE GRAINS TENDING TO BE SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE BACKING SHEET.
Claim 2
Independent Claim
127 words
A METHOD OF MAKING A COATED ABRASIVE SHEET COMPRISING THE STEPS OF: DEPOSITING A FIRST OPEN COATING OF ABRASIVE GRAINS UPON A MOVING BACKING SHEET HAVING AN ADHESIVE COATING THEREON, EMBEDDING AND REDISTRIBUTING SAID ABRASIVE GRAINS IN SAID ADHESIVE COATING BY PRESSURE CONTACT OF A DRIVEN MEMBER WHOSE SURFACE IS MOVING RELATIVE TO THE CONTACTED ABRASIVE AD ADHESIVE COATING WHEREBY A SLIPPING CONTACT EFFECTIVE TO REDISTRIBUTE THE ABRASIVE GRAINS IN SAID ADHESIVE COATING IS MAINTAINED BETWEEN SAID MEMBER AND SAID COATING; AND THEREAFTER APPLYING DIRECTLY TO SAID FIRST OPEN COATING OF ABRASIVE GRAINS AND ADHESIVE A SECOND COATING OF ABRASIVE GRAINS, SAID SECOND COATING OF GRAINS BEING DEPOSITED WITH THE LONG AXIS OF THE GRAINS TENDING TO BE SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE BACKING SHEET.
References Cited (Backward Citations)
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US1915905A
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US2245301A
Cited
US2371605A
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US2819178A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |