US4368738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cannula
Assignee: BIONIC GESELLSCHAFT fur ANGEWANDET MEDIZINTECHINK MBH and Co KG
•
Filing: 1981-03-31
•
Granted: 1983-01-18
•
Expires: 2001-03-31
Abstract
Abstract An improved dialysis cannula includes an obliquely sharpened point formed by an oblique ground surface. The point includes a front portion which is disposed at an obtuse angle to the remainder of the ground surface, thereby providing a lancet-like front portion which facilitates proper insertion of the cannula into the blood vessel of a patient.
Inventors
- 👤 Bernd Tersteegen
- 👤 Gunter Van Endert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:13
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3417
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface.
Claim 2
Dependent Claim
32 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface.
Claim 3
Dependent Claim
22 words
A cannula as claimed in claim 1, wherein the front portion is distinguished from the rest of the point by a bend.
Claim 4
Dependent Claim
23 words
A cannula as claimed in claim 1, wherein the front portion is bent inwardly with respect to the longitudinal axis of the cannula.
Claim 5
Dependent Claim
20 words
A cannula as claimed in claim 2, wherein the front portion is approximately one-third of the length of the point.
Claim 6
Dependent Claim
19 words
A cannula as claimed in claims 1, 2, or 3, wherein the front portion has a slightly curved surface.
Claim 7
Dependent Claim
19 words
A cannula as claimed in claims 1, 2 or 3, wherein the front portion defines an essentially planar surface.
Claim 8
Dependent Claim
29 words
A cannula as claimed in any one of claims 1, 2 or 3, and a fixed handle projecting from the side of the cannula opposite the obliquely ground surface.
Claim 9
Dependent Claim
19 words
A cannula as claimed in claim 7, wherein the handle has on at least one side a self-sealing adhesive.
Claim 10
Dependent Claim
45 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface, wherein the front portion is approximately one-third of the length of the point.
Claim 11
Dependent Claim
45 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface, wherein the front portion is approximately one-third of the length of the point.
Claim 12
Dependent Claim
61 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface, wherein the front portion is bent inwardly with respect to the longitudinal axis of the cannula, wherein the front portion is approximately one-third of the length of the point.
Claim 13
Dependent Claim
61 words
A dialysis cannula having an obliquely sharpened point formed by an oblique ground surface, wherein the point comprises a front portion disposed at an obtuse angle with respect to the ground surface, wherein the front portion is bent inwardly with respect to the longitudinal axis of the cannula, wherein the front portion is approximately one-third of the length of the point.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |