US3233736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drum filters
Assignee: Individual
•
Filing: 1963-02-26
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Granted: 1966-02-08
•
Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Vernay Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:23
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06; B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/44; B01D33/46; B01D33/465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A WHITENING AND RECOVERY ROTARY DRUM FILTER FOR PAPER-MAKING MACHINES COMPRISING; A CYLINDRICAL AND HOLLOW ROTARY DRUM WITH PERFORATED PERIPHERAL WALL ROTATING ABOUT A HORIZONTAL AXIS; TWO HOLLOW TRUNNIONS COAXIAL THEREWITH AND RIGIDLY SECURED TO SAID DRUM; AN INTERNAL HOLLOW RING SITUATED IN THE MIDDLE PORTION OF SAID DRUM; A FILTERING CLOTH OUTWARDLY COATING SAID PERFORATED PERIPHERAL WALL; A CYLINDRICAL COLLECTOR INWARDLY FACING SAID PERFORATED WALL AND OPENING IN ITS MIDDLE PORTION INTO SAID HOLLOW RING; A PLURALITY OF INTERNAL PARTITIONS RADIALLY DISPOSED BETWEEN SAID COLLECTOR AND SAID PERFORATED WALL, SAID PARTITIONS INWARDLY EXTENDING AT THEIR MIDDLE PORTION INTO SAID HOLLOW RING THROUGH APERTURES DISPOSED ON SAID COLLECTOR; A VAT ROTATABLY SUPPORTING SAID TRUNNIONS OF SAID DRUM AND CONTAINING WATER TO BE FILTERED
Claim 2
Dependent Claim
123 words
A WHITENING AND RECOVERY ROTARY DRUM FILTER FOR PAPER-MAKING MACHINES COMPRISING; A CYLINDRICAL AND HOLLOW ROTARY DRUM WITH PERFORATED PERIPHERAL WALL ROTATING ABOUT A HORIZONTAL AXIS; TWO HOLLOW TRUNNIONS COAXIAL THEREWITH AND RIGIDLY SECURED TO SAID DRUM; AN INTERNAL HOLLOW RING SITUATED IN THE MIDDLE PORTION OF SAID DRUM; A FILTERING CLOTH OUTWARDLY COATING SAID PERFORATED PERIPHERAL WALL; A CYLINDRICAL COLLECTOR INWARDLY FACING SAID PERFORATED WALL AND OPENING IN ITS MIDDLE PORTION INTO SAID HOLLOW RING; A PLURALITY OF INTERNAL PARTITIONS RADIALLY DISPOSED BETWEEN SAID COLLECTOR AND SAID PERFORATED WALL, SAID PARTITIONS INWARDLY EXTENDING AT THEIR MIDDLE PORTION INTO SAID HOLLOW RING THROUGH APERTURES DISPOSED ON SAID COLLECTOR; A VAT ROTATABLY SUPPORTING SAID TRUNNIONS OF SAID DRUM AND CONTAINING WATER TO BE FILTERED
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |