Patent US3516204A successfully refreshed from Google Patents.
US3516204A
Expired / Lapsed
US
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Abrading apparatus
Assignee: Pennwalt Corp
•
Filing: 1967-08-21
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Granted: 1970-06-23
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Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 Walter Kulischenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:11
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/06; B24C; B24C9/00; B24C9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US537160A
Cited
US955468A
Cited
US847269A
Cited
US955469A
Cited
US2455514A
Cited
US2597434A
Cited
US3075318A
Cited
US3344524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |