US3203775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganically bonded abrasive articles
Assignee: Unifrax I LLC
•
Filing: 1961-11-21
•
Granted: 1965-08-31
•
Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Cantrell John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; B24D3/18; B24D3/06; B24D3/10; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A HOT PRESSED ABRASIVE ARTICLE CONSISTING ESSENTIALLY OF DIAMOND GRANULAR ABRASIVE MATERIAL BONDED TOGETHER BY A FUSED METALLIC POWDER BONDING MIXTURE CONTAINING BY WEIGHT ABOUT 80% OF COPPER AND ABOUT 20% OF TIN, SAID BONDING MATERIAL INCORPORATING ABOUT AN EQUAL AMOUNT BY VOLUME OF PORE-FORMING MATERIAL CONSISTING ESSENTIALLY OF SODIUM PYROPHOSPHATE.
Claim 2
Dependent Claim
51 words
A HOT PRESSED ABRASIVE ARTICLE CONSISTING ESSENTIALLY OF DIAMOND GRANULAR ABRASIVE MATERIAL BONDED TOGETHER BY A FUSED METALLIC POWDER BONDING MIXTURE CONTAINING BY WEIGHT ABOUT 80% OF COPPER AND ABOUT 20% OF TIN, SAID BONDING MATERIAL INCORPORATING ABOUT AN EQUAL AMOUNT BY VOLUME OF PORE-FORMING MATERIAL CONSISTING ESSENTIALLY OF SODIUM PYROPHOSPHATE.
Claim 3
Dependent Claim
55 words
A HOT PRESSED ABRASIVE GRINDING WHEEL CONSISTING ESSENTIALLY OF DIAMOND GRANULAR ABRASIVE MATERIAL BONDED TOGETHER BY A FUSED METALLIC BONDING MIXTURE CONTAINING BY WEIGHT ABOUT 10% OF SILVER, ABOUT 20% OF TIN AND ABOUT 70% OF COPPER, SAID BONDING MIXTURE INCORPORATING ABOUT AN EQUAL AMOUNT BY VOLUME OF PORE-FORMING MATERIAL CONSISTING ESSENTIALLY OF SODIUM PYROPHOSPHATE.
Claim 4
Dependent Claim
55 words
A HOT PRESSED ABRASIVE GRINDING WHEEL CONSISTING ESSENTIALLY OF DIAMOND GRANULAR ABRASIVE MATERIAL BONDED TOGETHER BY A FUSED METALLIC BONDING MIXTURE CONTAINING BY WEIGHT ABOUT 10% OF SILVER, ABOUT 20% OF TIN AND ABOUT 70% OF COPPER, SAID BONDING MIXTURE INCORPORATING ABOUT AN EQUAL AMOUNT BY VOLUME OF PORE-FORMING MATERIAL CONSISTING ESSENTIALLY OF SODIUM PYROPHOSPHATE.
References Cited (Backward Citations)
US504388A
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US2042635A
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US1987861A
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US2420859A
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GB619098A
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US2782110A
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US2785060A
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US2980524A
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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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |