Patent US4515841A successfully refreshed from Google Patents.
US4515841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pore forming sterilization bag
Assignee: American Sterilizer Co
•
Filing: 1983-12-30
•
Granted: 1985-05-07
•
Expires: 2003-12-30
Abstract
Abstract A receptacle for handling contaminated waste for sterilization and subsequent disposal which is a pore forming sterilization bag made from a thermoplastic resin which has been embedded with either soluble materials or melt materials which respond to the temperature and moisture of steam sterilization to form pores in the bag, thus permitting the entrance of sterilant and the exit of air for sterilization of the waste. The melt materials are low molecular weight polymers such as carbowaxes. The soluble materials can be either organic or inorganic materials such as polyvinyl alcohol, polyvinyl acetate, polyvinyl pyrrolidone and various inorganic salts, such as sodium chloride.
Inventors
- 👤 Denis G. Dyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:40
CPC Classifications
B; B65; B65D; B65D33/00; A; A61; A61L; A61L2/00; A61L2/26; B65D65/00; B65D65/38; B65D65/42; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
39 words
A receptacle for handling contaminated waste for steam sterilization and subsequent disposal comprising: a bag formed from an air and water impervious thermoplastic film, said film having means embedded therein to form pores therethrough upon exposure to steam sterilization.
Claim 2
Dependent Claim
39 words
A receptacle for handling contaminated waste for steam sterilization and subsequent disposal comprising: a bag formed from an air and water impervious thermoplastic film, said film having means embedded therein to form pores therethrough upon exposure to steam sterilization.
Claim 3
Dependent Claim
47 words
A receptacle as recited in claim 1 wherein said pore forming means are soluble materials so coated with a web of said film that said soluble materials are stable at room temperature and swell upon exposure to steam sterilization thereby rupturing said webs to form said pores.
Claim 4
Dependent Claim
15 words
A receptacle as recited in claim 2 wherein said soluble materials are organic in nature.
Claim 5
Dependent Claim
15 words
A receptacle as recited in claim 2 wherein said soluble materials are inorganic in nature.
Claim 6
Dependent Claim
27 words
A receptacle as recited in claim 2 wherein said soluble materials are selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, polyvinyl pyrrolidone and sodium chloride.
Claim 7
Dependent Claim
35 words
A receptacle as recited in claim 2 wherein said pore forming means are low molecular weight polymers which are solid at room temperature and which melt upon exposure to steam sterilization thereby forming said pores.
Claim 8
Dependent Claim
12 words
A receptacle as recited in claim 6 wherein said polymers are carbowaxes.
Claim 9
Dependent Claim
12 words
A receptacle as recited in claim 1 wherein said film is polypropylene.
Claim 10
Dependent Claim
57 words
. A receptacle for handling contaminated waste for steam sterilization and subsequent disposal comprising: a polypropylene bag for holding the waste, said bag having means embedded therein to form pores therethrough upon exposure to steam sterilization, said pores permitting the entrance of sterilant into and the exit of air from said bag for sterilization of the waste.
Claim 11
Dependent Claim
57 words
. A receptacle for handling contaminated waste for steam sterilization and subsequent disposal comprising: a polypropylene bag for holding the waste, said bag having means embedded therein to form pores therethrough upon exposure to steam sterilization, said pores permitting the entrance of sterilant into and the exit of air from said bag for sterilization of the waste.
Claim 12
Dependent Claim
37 words
A receptacle as recited in claim 6 wherein said pores are generally uniformly distributed in a quantity sufficient for sterilization of the waste without impairment of the structural integrity of said bag for disposal of the waste.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |