Patent US3405884A successfully refreshed from Google Patents.
US3405884A
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US
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Boundary layer eliminator
Assignee: Beloit Corp
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Filing: 1966-09-08
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Granted: 1968-10-15
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry R Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
D; D21; D21G; D21G9/00; D21G9/0009; B; B65; B65H; B65H18/00; B65H18/08; B65H18/14; B65H18/20; B65H23/00; B65H23/04; B65H23/24; B65H23/26; B65H27/00; B65H2404/00; B65H2404/10; B65H2404/13; B65H2404/131; B65H2404/1316; B65H2404/13162; B65H2404/13163; Y; Y10; Y10S; Y10S242/00; Y10S242/908
Claims Analysis
Total Claims: 0
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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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |