Patent US3808747A successfully refreshed from Google Patents.
US3808747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical finishing and media therefor
Assignee: Wheelabrator Corp
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Filing: 1972-05-24
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Granted: 1974-05-07
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Expires: 1992-05-24
Abstract
Abstract This invention is addressed to mechanical finishing and media therefor wherein the finishing media are formed of geometric shapes of bauxite particles which have been sintered at a temperature within the range of 2,900*-3,100* F.
Inventors
- 👤 W Kenagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/12; B24B31/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
34 words
A method as defined in claim 1 wherein the ratio of the height of the pyramid to the length of the longest diagonal of the base is within the range of 0.8 to 1.2.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |