Patent US3401489A successfully refreshed from Google Patents.
US3401489A
Expired / Lapsed
US
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Apparatus for airless blast finishing
Assignee: Individual
•
Filing: 1966-02-28
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Granted: 1968-09-17
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Evert H Wern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US859863A
Cited
US1953566A
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US2170831A
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US2077638A
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US2092962A
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US2279342A
Cited
US2225482A
Cited
US2275434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |