US4000341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autoclavable, corrugated, respiratory care tubing
Assignee: 3M Co
•
Filing: 1975-05-23
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Granted: 1976-12-28
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Expires: 1995-05-23
Abstract
Abstract Autoclavable, corrugated, respiratory care tubing comprising thermoplastic material which is aliphatic olefin polymer, aromatic olefin block polymer or mixtures thereof, the material being hydrolytically stable, having a flexular modulus according to A.S.T.M. D-790 of less than 1800 kg/cm 2 , having a Shore A hardness according to A.S.T.M. D-2240 of from 45 to 92 and being substantially dimensionally stable in steam at temperatures of at least about 120° C.
Inventors
- 👤 Gale Wendell Matson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/111; A; A61; A61M; A61M16/00; A61M16/08; A61M16/0875; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/12; B29C49/00; B29C49/0005; C; C08; C08L; C08L23/00; C08L23/02; A61M2207/00; A61M2207/10; B29C48/001; B29C48/0018; B29C48/13; B29L; B29L2023/00; B29L2023/003; Y; Y10; Y10S; Y10S128/00; Y10S128/911; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
Autoclavable corrugated, respiratory care tubing comprising thermoplastic material selected from the class consisting of aliphatic olefin polymer, aromatic olefin block polymer and mixtures thereof, said material being hydrolytically stable, having a flexular modulus according to A.S.T.M. D-790 of less than 1800 kg/cm 2 , having a Shore A hardness according to A.S.T.M. D-2240 of from 45 to 92 and being substantially dimensionally stable in steam at temperatures of at least about 120° C.
Claim 2
Dependent Claim
73 words
Autoclavable corrugated, respiratory care tubing comprising thermoplastic material selected from the class consisting of aliphatic olefin polymer, aromatic olefin block polymer and mixtures thereof, said material being hydrolytically stable, having a flexular modulus according to A.S.T.M. D-790 of less than 1800 kg/cm 2 , having a Shore A hardness according to A.S.T.M. D-2240 of from 45 to 92 and being substantially dimensionally stable in steam at temperatures of at least about 120° C.
Claim 3
Dependent Claim
23 words
The tubing of claim 1 wherein the thermoplastic material is substantially dimensionally stable in steam at temperatures of at least about 135° C.
Claim 4
Dependent Claim
14 words
The tubing of claim 2 wherein said thermoplastic material comprises polypropylene and ethylene-propylene polymer.
Claim 5
Dependent Claim
10 words
The tubing of claim 3 wherein said polypropylene is isotactic.
Claim 6
Dependent Claim
12 words
The tubing of claim 4 wherein said thermoplastic material includes another polyolefin.
Claim 7
Dependent Claim
12 words
The tubing of claim 5 wherein said other polyolefin comprises nonisotactic polypropylene.
Claim 8
Dependent Claim
15 words
The tubing of claim 2 wherein said thermoplastic material comprises hydrogenated aromatic olefin block polymer.
Claim 9
Dependent Claim
21 words
The tubing of claim 7 wherein said thermoplastic material comprises a mixture of aliphatic olefin polymer and hydrogenated styrene/isoprene/styrene block polymer.
Claim 10
Dependent Claim
12 words
The tubing of claim 8 wherein said aliphatic olefin polymer comprises polypropylene.
Claim 11
Dependent Claim
15 words
The tubing of claim 8 wherein said aliphatic olefin polymer comprises polypropylene and ethylene-propylene polymer.
References Cited (Backward Citations)
US3175999A
Cited
US2898941A
Cited
US3378606A
Cited
US3478128A
Cited
US3457920A
Cited
US3894117A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |