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Patent US3477180A successfully refreshed from Google Patents.
US3477180A
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US
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Reinforced grinding wheels and reinforcement network therefor
Assignee: Saint Gobain Abrasives Inc
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Filing: 1965-06-14
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Granted: 1969-11-11
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 John Robertson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:27
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0081; B24D5/00; B24D5/02; B24D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228257A
Cited
US3123948A
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US699302A
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US1860224A
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US3141271A
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US3262230A
Cited
US3208838A
Cited
US3315418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |