US3352749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainage control elements for paper machines
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1966-04-07
•
Granted: 1967-11-14
•
Expires: 1986-04-07
Abstract
No abstract record available.
Inventors
- 👤 James H Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/483; D21F1/52; D21F1/523
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN A PAPER-MAKING MACHINE HAVING A TRAVELING SCREEN FOR SUPPORTING WATER-WET PULP DURING THE DRAINAGE OF WATER THEREFROM AND TRANSVERSELY EXTENDING PLATES ARRANGED LONGITUDINALLY AND CONTACTING SAID SCREEN TO CONTROL THE DRAINAGE OF WATER FROM SAID PULP, THE IMPROVEMENT WHEREIN SAID PLATES HAVE A SMOOTH, HARD, POROUS CERAMIC SCREEN CONTACTING FACE PORTION.
Claim 2
Dependent Claim
52 words
IN A PAPER-MAKING MACHINE HAVING A TRAVELING SCREEN FOR SUPPORTING WATER-WET PULP DURING THE DRAINAGE OF WATER THEREFROM AND TRANSVERSELY EXTENDING PLATES ARRANGED LONGITUDINALLY AND CONTACTING SAID SCREEN TO CONTROL THE DRAINAGE OF WATER FROM SAID PULP, THE IMPROVEMENT WHEREIN SAID PLATES HAVE A SMOOTH, HARD, POROUS CERAMIC SCREEN CONTACTING FACE PORTION.
References Cited (Backward Citations)
US3006782A
Cited
US3067816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |