Patent US2797017A successfully refreshed from Google Patents.
Patent US3250671A successfully refreshed from Google Patents.
US3250671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid flow control device having improved surface for operative engagement with relatively moving paper machine forming wire
Assignee: Beloit Corp
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Filing: 1965-05-07
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Granted: 1966-05-10
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Charles W E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:30
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A SUCTION BOX COVER FOR FOURDRINIER MACHINES COMPRISING A PERFORATED COVER FOR THE SUCTION BOX AND IN COMTACT WITH WHICH IS MOVED THE FOURDRINIER SCREEN WIRE, SAID COVER COMPRISING A PERFORATED BASE MEMBER AND A SCREEN WIRE CONTACTING BODY CONSISTING ESSENTIALLY OF A LAYER OF CRYSTALLINE REFRACTORY METAL OXIDE CERAMIC MATERIAL SECURED TO SAID PERFORATED BASE MEMBER, SAID CERAMIC MATERIAL PRESENTING A SMOOTH MIRROR FINISH SURFACE TO SAID WIRE.
Claim 2
Dependent Claim
69 words
A SUCTION BOX COVER FOR FOURDRINIER MACHINES COMPRISING A PERFORATED COVER FOR THE SUCTION BOX AND IN COMTACT WITH WHICH IS MOVED THE FOURDRINIER SCREEN WIRE, SAID COVER COMPRISING A PERFORATED BASE MEMBER AND A SCREEN WIRE CONTACTING BODY CONSISTING ESSENTIALLY OF A LAYER OF CRYSTALLINE REFRACTORY METAL OXIDE CERAMIC MATERIAL SECURED TO SAID PERFORATED BASE MEMBER, SAID CERAMIC MATERIAL PRESENTING A SMOOTH MIRROR FINISH SURFACE TO SAID WIRE.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |