Patent US3276248A successfully refreshed from Google Patents.
US3276248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detecting perforated screens
Assignee: Individual
•
Filing: 1963-09-09
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Granted: 1966-10-04
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Cyr Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:05
CPC Classifications
D; D21; D21G; D21G9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
IN A SYSTEM FOR MANUFACTURING PAPER AND THE LIKE, INCLUDING A FOURDRINIER PAPER-MAKING MACHINE AND A PULP SUSPENSION FEEDING CIRCUIT FOR SAID MACHINE, SAID CIRCUIT COMPRISING FILTERING ELEMENTS FOR RETAINING UNCOOKED PULP PARTICLES AND FOR ALLOWING PASSAGE OF COOKED PULP PARTICLES, IN COMBINBATION, AN APPARATUS FOR DETECTING PERFORATIONS IN SAID FILTERING ELEMENTS COMPRISING A FUNNEL DEFINING A RESTRICTED ORIFICE OPEN TO ATMOSPHERE THROUGH CIRCUIT IN A ZONE DOWNSTREAM FROM SAID FILTERING ELEMENTS BUT UPSTREAM FROM SAID PAPER MAKING MACHINE, SAID FUNNEL DEFINING A RESTRICTED ORIFICE OPEN TO ATMOSPHERE THROUGH WHICH SAID PULP SUSPENSION NORMALLY EMERGES AS A JET, THE PRESENCE OF UNCOOKED BIGGER SIZE PARTICLES ELEPULP SUSPENSION DUE TO PERFORMATION OF SAID FILTERING ELEMENTS RESULTING IN THE BLOCKING OF SAID RESTRICTED ORIFICE, AND MEANS FOR DETECTING AND FOR SIGNALLING SAID BLOCKING OF SAID JET ORIFICE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |