US3454384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing graphite-bond grinding wheels for precision grinding
Assignee: Individual
•
Filing: 1966-05-24
•
Granted: 1969-07-08
•
Expires: 1986-05-24
Abstract
No abstract record available.
Inventors
- 👤 Naojiro Kumagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:09
CPC Classifications
B; B24; B24D; B24D18/00; B24D3/00; B24D3/34; C; C04; C04B; C04B33/00; C04B33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1479107A
Cited
US1546115A
Cited
US1483507A
Cited
US1844064A
Cited
US2132005A
Cited
US2281526A
Cited
US3321287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |