US3229425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient-backed abrasive stone
Assignee: Unifrax I LLC
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Filing: 1964-10-13
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Granted: 1966-01-18
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Expires: 1984-10-13
Abstract
No abstract record available.
Inventors
- 👤 Roger H Homeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:21
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN ABRASIVE ARTICLE COMPRISING A FLAT, RIGID, BRITTLE ABRASIVE SHARPENING STORE OF BONDED ABRASIVE PARTICLES, SAID STONE BEING ADAPTED FOR SAFE MANUAL OPERATION AND SAID STONE BEING RELATIVELY THIN IN COMPARISON WITH CONVENTIONAL SHARPENING STONES AND HAVING A THICKNESS OF THE ORDER OF 1/8-INCH TO 1/2-INCH; AND A BACKING MEMBER OF RESILIENT, FLEXIBLE, NON-SLIP MATERIAL ADHESIVELY SECURED TO THE REAR SURFACE OF SAID STONE AND FUNCTIONING AS A STABLE, NON-SLIP BASE FOR HOLDING SAID STONE IMMOVABLE IN A FLAT SHARPENING POSITION ON A SURFACE.
Claim 2
Dependent Claim
84 words
AN ABRASIVE ARTICLE COMPRISING A FLAT, RIGID, BRITTLE ABRASIVE SHARPENING STORE OF BONDED ABRASIVE PARTICLES, SAID STONE BEING ADAPTED FOR SAFE MANUAL OPERATION AND SAID STONE BEING RELATIVELY THIN IN COMPARISON WITH CONVENTIONAL SHARPENING STONES AND HAVING A THICKNESS OF THE ORDER OF 1/8-INCH TO 1/2-INCH; AND A BACKING MEMBER OF RESILIENT, FLEXIBLE, NON-SLIP MATERIAL ADHESIVELY SECURED TO THE REAR SURFACE OF SAID STONE AND FUNCTIONING AS A STABLE, NON-SLIP BASE FOR HOLDING SAID STONE IMMOVABLE IN A FLAT SHARPENING POSITION ON A SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |