Patent US4392855A successfully refreshed from Google Patents.
US4392855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: SHERWOOD-ACCURATE Inc
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Filing: 1981-04-14
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Granted: 1983-07-12
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Expires: 2001-04-14
Abstract
Abstract The invention is a permanent catheter for use in the practice of peritoneal dialysis. It has a bead on the tube that, in use, underlies the peritoneum and a cuff made of a fibrous material that has a disc that overlies the peritoneum and forms a scar tissue as a seal.
Inventors
- 👤 Dimitrios G. Oreopoulos
- 👤 Gabor Zellerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61M1/00; A61M1/14; A61M1/28; A61M1/285; A61M25/00; A61M25/01; A61M25/02; A61M2025/0293; A61M2039/0273; A61M2039/0282; A61M2039/0291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A permanent peritoneal catheter of flexible tubing comrpising a continuous flexible tube having a perforate peritoneum section, a subcutaneous section and an exterior section; said peritoneum section having flexible locating discs of inert plastics material extending therefrom; the peritoneum section having a circumferentially extending bead of inert material adjacent the subcutaneous section and a fibrous peritoneum cuff outwardly of and close to the bead; said fibrous peritoneum cuff having a fibrous disc extending radially therefrom; said fibrous peritoneum cuff and fibrous disc being close to said bead as aforesaid whereby to cooperate with said bead to hold a peritoneum membrane therebetween and form a seal at the peritoneum membrane in use; the subcutaneous section having means for sealing the catheter at the outer skin.
Claim 2
Dependent Claim
124 words
A permanent peritoneal catheter of flexible tubing comrpising a continuous flexible tube having a perforate peritoneum section, a subcutaneous section and an exterior section; said peritoneum section having flexible locating discs of inert plastics material extending therefrom; the peritoneum section having a circumferentially extending bead of inert material adjacent the subcutaneous section and a fibrous peritoneum cuff outwardly of and close to the bead; said fibrous peritoneum cuff having a fibrous disc extending radially therefrom; said fibrous peritoneum cuff and fibrous disc being close to said bead as aforesaid whereby to cooperate with said bead to hold a peritoneum membrane therebetween and form a seal at the peritoneum membrane in use; the subcutaneous section having means for sealing the catheter at the outer skin.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |