US4351900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test method and apparatus for the presence of microorganisms in ampoule
Assignee: EMD Millipore Corp
•
Filing: 1981-01-30
•
Granted: 1982-09-28
•
Expires: 2001-01-30
Abstract
Abstract A method and apparatus for testing the sterility of the dry contents of a sterile ampoule. A dual channel needle is inserted into the container and a dissolving solution is injected into the ampoule to form a solution. A rinsing solution is circulated into the interior of the apparatus to remove that solution which is then directed to means for culturing and incubating a filtrate of the solution to determine whether microorganisms are present therein. The needle is retained by hand into the ampoule and held by the cap of the closed transfer chamber during rinsing.
Inventors
- 👤 Jean Lemonnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:37
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/22; C12M; C12M33/00; C12M33/04; C12M37/00; C12M37/02; C12M37/06; C12M41/00; C12M41/30; C12M41/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
Apparatus for testing the sterility of the dry contents of a container which comprises a tubular member, a spout positioned at an intermediate point along said tubular member, a needle having a first channel and a second channel, said first channel being longer than said second channel, said needle being positioned within said tubular member to provide fluid communication through said tubular member through said first channel into said container and said second channel positioned to provide fluid communication from said container to said spout.
Claim 2
Dependent Claim
85 words
Apparatus for testing the sterility of the dry contents of a container which comprises a tubular member, a spout positioned at an intermediate point along said tubular member, a needle having a first channel and a second channel, said first channel being longer than said second channel, said needle being positioned within said tubular member to provide fluid communication through said tubular member through said first channel into said container and said second channel positioned to provide fluid communication from said container to said spout.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 including means attached to said spout for stably positioning said container axially with said dual channel needle.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 including means to direct liquid from said spout to a plurality of sterile containers, each of said sterile containers including filter means for filtering microorganisms from said liquid.
Claim 5
Dependent Claim
131 words
The process for testing the sterility of the dry contents of a container having a seal which comprises penetrating the seal with a dual channel needle, said needle being positioned within a tubular member having a spout communicating with the interior of said tubular member, passing a liquid capable of dissolving said dry contents through a first channel of said needle to form a solution within said container, passing a sterile rinsing solution through said first channel thereby to force said solution through a second channel of said needle and through said spout, passing said solution from said spout through a filter under sterile conditions, contacting said filter with a growth medium incubating said growth medium and filtered material under sterile conditions and observing the extent of growth on said medium.
Claim 6
Dependent Claim
131 words
The process for testing the sterility of the dry contents of a container having a seal which comprises penetrating the seal with a dual channel needle, said needle being positioned within a tubular member having a spout communicating with the interior of said tubular member, passing a liquid capable of dissolving said dry contents through a first channel of said needle to form a solution within said container, passing a sterile rinsing solution through said first channel thereby to force said solution through a second channel of said needle and through said spout, passing said solution from said spout through a filter under sterile conditions, contacting said filter with a growth medium incubating said growth medium and filtered material under sterile conditions and observing the extent of growth on said medium.
Claim 7
Dependent Claim
13 words
The process of claim 4 wherein said growth medium is a thioglycollate solution.
Claim 8
Dependent Claim
13 words
The process of claim 4 wherein said growth medium is soybean-casein digest medium.
Claim 9
Dependent Claim
13 words
The process of claim 4 wherein said growth medium is a Sabouraud medium.
Claim 10
Dependent Claim
42 words
The process of claim 4 wherein said liquid exiting from said spout is formed into aliquots and wherein each aliquot is passed through a separate filter under sterile conditions and each of said filters is contacted with a growth medium and incubated.
References Cited (Backward Citations)
US4036698A
Cited
US4292405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |