Patent US3941573A successfully refreshed from Google Patents.
US3941573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing anesthetic gases
Assignee: Individual
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Filing: 1974-05-02
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Granted: 1976-03-02
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Expires: 1994-05-02
Abstract
Abstract Apparatus is disclosed for removing medical anesthetic gases, after inhalation by a patient, in order to prevent these gases from being expelled into an operating room. In one embodiment, the apparatus includes a housing adapted to be connected into an anesthetic gas system, and a removable and disposable cartridge in the housing including at least two anesthetic gas adsorbent fillers. In other embodiments a disposable cartridge may be employed without a housing which can be readily connected into the anesthetic gas system.
Inventors
- 👤 James Frederick Chapel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:08
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0415; A; A61; A61M; A61M16/00; A61M16/0087; A61M16/009; A61M16/0093; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/30; B01D2253/302; B01D2253/304; B01D2259/00; B01D2259/40; B01D2259/414; B01D2259/4141; B01D2259/4143; B01D2259/45; B01D2259/4533; B01D53/0446
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
A disposable cartridge for use in adsorbing anesthesia gases in an anesthesia system, comprising: a cylindrical outer shell made of a disposable material including at least one perforated end member; two filter means disposed in said shell each being adjacent one of the ends to permit the passage of a gas through said cartridge while preventing the passage of solid particles; and at least two adsorbent fillers for adsorbing anesthesia gases disposed in said shell between said filter means so that said fillers are mixed together, one of said adsorbent fillers being substantially spherical shaped activated carbon and the other of said adsorbent fillers being molecular sieve shaped of a configuration that permits it to lie in voids between said spherical shaped fillers, said fillers being of sufficient quantity in said shell to provide for a relatively long useful life for said cartridge when used to adsorp anesthesia gases evacuated by a human patient while permitting effective evacuation of the respiratory system of such a patient.
Claim 2
Dependent Claim
166 words
A disposable cartridge for use in adsorbing anesthesia gases in an anesthesia system, comprising: a cylindrical outer shell made of a disposable material including at least one perforated end member; two filter means disposed in said shell each being adjacent one of the ends to permit the passage of a gas through said cartridge while preventing the passage of solid particles; and at least two adsorbent fillers for adsorbing anesthesia gases disposed in said shell between said filter means so that said fillers are mixed together, one of said adsorbent fillers being substantially spherical shaped activated carbon and the other of said adsorbent fillers being molecular sieve shaped of a configuration that permits it to lie in voids between said spherical shaped fillers, said fillers being of sufficient quantity in said shell to provide for a relatively long useful life for said cartridge when used to adsorp anesthesia gases evacuated by a human patient while permitting effective evacuation of the respiratory system of such a patient.
Claim 3
Dependent Claim
12 words
The cartridge of claim 1 wherein said shell is made of cardboard.
Claim 4
Dependent Claim
13 words
The cartridge of claim 1 wherein each end of the cartridge is perforated.
Claim 5
Dependent Claim
22 words
The cartridge of claim 1 wherein one of the ends of the cartridge is perforated and the other includes a nipple connector.
Claim 6
Dependent Claim
17 words
The cartridge of claim 1 wherein each of the ends of the cartridge includes a nipple connector.
Claim 7
Dependent Claim
34 words
The cartridge of claim 1 wherein the quantity of said activated carbon and said molecular sieve in said cartridge is in a ratio of about 2:1 to about 5:1 activated carbon to molecular sieve.
Claim 8
Dependent Claim
16 words
The cartridge of claim 6 wherein said ratio is about 3:1 activated carbon to molecular sieve.
Claim 9
Dependent Claim
23 words
The cartridge of claim 1 wherein said shell comprises a central core section and two end sections telescoped over said central core section.
Claim 10
Dependent Claim
16 words
The cartridge of claim 8 wherein said central core and end sections are made of cardboard.
Claim 11
Dependent Claim
207 words
A disposable cartridge for use in adsorbing anesthesia gases in an anesthesia system, comprising: a cylindrical outer shell made of a disposable material including perforated end members; two filter means disposed in said shell each being adjacent one of the end members to permit the passage of a gas through said cartridge while preventing the passage of solid particles; and at least two adsorbent fillers for adsorbing anesthesia gases disposed in said shell between said filter means so that said fillers are mixed together, one of said adsorbent fillers being substantially spherical shaped and having a particle size of about 6 to about 30 U.S. Sieve Series, and the other of said adsorbent fillers being shaped of a configuration that permits it to lie in voids between said spherical shaped fillers, and having a particle size in the range of about one-eight to about one-sixteenth inch in size, the quantity of said fillers in said shell being in the ratio of about 2:1 to about 5:1 of the substantially spherically shaped filler to the other filler, and sufficient to provide effective adsorption of anesthesia gas in an anesthesia system for up to about 12 hours without creating excessive back pressures on the respiratory system of a patient.
Claim 12
Dependent Claim
207 words
A disposable cartridge for use in adsorbing anesthesia gases in an anesthesia system, comprising: a cylindrical outer shell made of a disposable material including perforated end members; two filter means disposed in said shell each being adjacent one of the end members to permit the passage of a gas through said cartridge while preventing the passage of solid particles; and at least two adsorbent fillers for adsorbing anesthesia gases disposed in said shell between said filter means so that said fillers are mixed together, one of said adsorbent fillers being substantially spherical shaped and having a particle size of about 6 to about 30 U.S. Sieve Series, and the other of said adsorbent fillers being shaped of a configuration that permits it to lie in voids between said spherical shaped fillers, and having a particle size in the range of about one-eight to about one-sixteenth inch in size, the quantity of said fillers in said shell being in the ratio of about 2:1 to about 5:1 of the substantially spherically shaped filler to the other filler, and sufficient to provide effective adsorption of anesthesia gas in an anesthesia system for up to about 12 hours without creating excessive back pressures on the respiratory system of a patient.
Claim 13
Dependent Claim
20 words
The cartridge of claim 10 wherein said one of said fillers is activated carbon and the other is molecular sieve.
References Cited (Backward Citations)
US1866659A
Cited
US3183906A
Cited
US3169112A
Cited
US3283479A
Cited
US3406501A
Cited
US3555787A
Cited
US3557534A
Cited
DE1964739A1
Cited
US3681899A
Cited
US3713273A
Cited
US3815752A
Cited
US3867936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |