Patent US3640283A successfully refreshed from Google Patents.
US3640283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable blood-warming container
Assignee: Baxter International Inc
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Filing: 1970-03-02
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Granted: 1972-02-08
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Expires: 1990-03-02
Abstract
Abstract A container for adjusting the temperature of liquids such as blood flowing therethrough, which comprises a plastic envelope, heat sealed to define a tortuous fluid flow conduit therein. The conduit has an inlet and an outlet communicating with the exterior of the container. The outlet communicates with the interior of a drip chamber, the end of the outlet being spaced from the walls of the drip chamber to permit liquid passing from the outlet to fall a short distance through space, to indicate the rate of liquid flow, and to separate and entrap in the drip chamber any gas bubbles present.
Inventors
- 👤 Surindar Kumar Bhatia
- 👤 Charles Rogers Memhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:35
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/44; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M1/369; A61M2205/00; A61M2205/36; A61M2205/3653
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A container for adjusting the temperature of liquid flowing therethrough, which comprises a plastic envelope, heat sealed to define a tortuous fluid flow conduit therein, an inlet and an outlet to said conduit communicating with the exterior of said container, a drip chamber, said outlet communicating with the interior of said drip chamber and disposed In transverse relation to said drip chamber passing through a sidewall of said chamber, the end of said outlet being spaced from the walls of said drip chamber to separate and trap in said chamber any bubbles present.
Claim 2
Dependent Claim
93 words
A container for adjusting the temperature of liquid flowing therethrough, which comprises a plastic envelope, heat sealed to define a tortuous fluid flow conduit therein, an inlet and an outlet to said conduit communicating with the exterior of said container, a drip chamber, said outlet communicating with the interior of said drip chamber and disposed In transverse relation to said drip chamber passing through a sidewall of said chamber, the end of said outlet being spaced from the walls of said drip chamber to separate and trap in said chamber any bubbles present.
Claim 3
Dependent Claim
33 words
The container of claim 1 in which said inlet is spaced below said outlet in position of use to facilitate the bubble-free filling of said fluid flow conduit by said liquid flowing therethrough.
Claim 4
Dependent Claim
29 words
The container of claim 2 in which said drip chamber has a liquid exit port which communicates with flexible tubing having means for mounting a blood administration needle thereon.
Claim 5
Dependent Claim
25 words
The container of claim 3 in which said inlet is in fluid communication with flexible tubing having coupling means for connection to a blood supply.
Claim 6
Dependent Claim
12 words
The container of claim 4 having a single tortuous fluid flow conduit.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |