US3289846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration or dialysis support apparatus
Assignee: Individual
•
Filing: 1964-02-24
•
Granted: 1966-12-06
•
Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Warrington Bert
- 👤 Rise Sandy
- 👤 Bishop Leonard William Jerome
- 👤 Wood Frank William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/06; B01D63/068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A FORMER FOR SUPPORTING A TUBULAR SEMI-PERMEABLE FLEXIBLE MEMBRANE IN FILTRATION OR DIALYSIS APPARATUS, INCLUDING A PLURALITY OF UNITARY RING-LIKE SUPPORTS ARRANGED TO EXTERNALLY EMBRACE AND SUPPORT SAID MEMBRANE THEREIN AT INTERVALS ALONG ITS LENGTH IN A COMPACT PREDETERMINED COILED CONFIGURATION FREE FROM SHARP TRANSITIONS IN DIRECTION, EACH RING-LIKE SUPPORT HAVING A PERIPHERAL GAP THROUGH WHICH THE MEMBRANE, WHEN IN A FLATTENED CONDITION, CAN BE PASSED LATERALLY INTO THE SUPPORT.
Claim 2
Dependent Claim
70 words
A FORMER FOR SUPPORTING A TUBULAR SEMI-PERMEABLE FLEXIBLE MEMBRANE IN FILTRATION OR DIALYSIS APPARATUS, INCLUDING A PLURALITY OF UNITARY RING-LIKE SUPPORTS ARRANGED TO EXTERNALLY EMBRACE AND SUPPORT SAID MEMBRANE THEREIN AT INTERVALS ALONG ITS LENGTH IN A COMPACT PREDETERMINED COILED CONFIGURATION FREE FROM SHARP TRANSITIONS IN DIRECTION, EACH RING-LIKE SUPPORT HAVING A PERIPHERAL GAP THROUGH WHICH THE MEMBRANE, WHEN IN A FLATTENED CONDITION, CAN BE PASSED LATERALLY INTO THE SUPPORT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |