Patent US3276595A successfully refreshed from Google Patents.
US3276595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drum vacuum filters
Assignee: Filtres Philippe SA
•
Filing: 1966-03-21
•
Granted: 1966-10-04
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Houpillart Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:00
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/044; B01D33/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A ROTARY DRUM VACUUM FILTER OF THE TYPE COMPRISING A TANK FOR LIQUID TO BE FILTERED, A ROTARY VACUUM DRUM HAVING A SEGMENT THEREOF RECEIVED IN SAID TANK AND AN ENDLESS FILTER CLOTH PASSING AROUND AND ENGAGING A PART OF THE CYLINDRICAL SURFACE OF THE DRUM INCLUDING SAID SEGMENT, THE IMPROVEMENT COMPRISING A PAIR OF ENDLESS BELTS EACH REGISTERING WITH A MARGINAL EDGE OF SAID CLOTH FOR URGING SAID MARGINAL EDGE INTO VACUUM SEALING CONTACT WITH SAID DRUM AT LEAST OVER THAT PART OF THE PATH DESCRIBED BY THE CLOTH IN WHICH SAID CLOTH PASSES AROUND SAID DRUM.
Claim 2
Dependent Claim
99 words
IN A ROTARY DRUM VACUUM FILTER OF THE TYPE COMPRISING A TANK FOR LIQUID TO BE FILTERED, A ROTARY VACUUM DRUM HAVING A SEGMENT THEREOF RECEIVED IN SAID TANK AND AN ENDLESS FILTER CLOTH PASSING AROUND AND ENGAGING A PART OF THE CYLINDRICAL SURFACE OF THE DRUM INCLUDING SAID SEGMENT, THE IMPROVEMENT COMPRISING A PAIR OF ENDLESS BELTS EACH REGISTERING WITH A MARGINAL EDGE OF SAID CLOTH FOR URGING SAID MARGINAL EDGE INTO VACUUM SEALING CONTACT WITH SAID DRUM AT LEAST OVER THAT PART OF THE PATH DESCRIBED BY THE CLOTH IN WHICH SAID CLOTH PASSES AROUND SAID DRUM.
References Cited (Backward Citations)
No citation records indexed.
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 |