US2806772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive bodies
Assignee: Electro Refractories and Abrasives Corp
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Filing: 1954-09-15
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Granted: 1957-09-17
•
Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Norman P Robie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:25
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ABRISIVE ARTICLE CONSISTING ESSENTIALLY OF ABRASIVE GRANUALS, A PHENOLIC RESIN BOND THEREFOR AND INDIVIDUAL MINUTE THIN WALLED HOLLOW SPHERES LESS THAN 0.025 INCH IN DIAMETER DISTRIBUTED THROUGHOUT THE RESIN BOND AND BETWEEN THE ABRASIVE GRANULES, SAID MINUTE WALLED HOLLOW SPHERES CONSTITUTION FROM 1 TO 30% OF THE VOLUME OF THE ARTICLE.
Claim 2
Dependent Claim
52 words
AN ABRISIVE ARTICLE CONSISTING ESSENTIALLY OF ABRASIVE GRANUALS, A PHENOLIC RESIN BOND THEREFOR AND INDIVIDUAL MINUTE THIN WALLED HOLLOW SPHERES LESS THAN 0.025 INCH IN DIAMETER DISTRIBUTED THROUGHOUT THE RESIN BOND AND BETWEEN THE ABRASIVE GRANULES, SAID MINUTE WALLED HOLLOW SPHERES CONSTITUTION FROM 1 TO 30% OF THE VOLUME OF THE ARTICLE.
References Cited (Backward Citations)
US2734812A
Cited
US1986849A
Cited
FR44410E
Cited
US2113185A
Cited
US2104609A
Cited
US2487207A
Cited
FR1040618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |