Patent US3615977A successfully refreshed from Google Patents.
US3615977A
Expired / Lapsed
US
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Method of insulating coaxial tubing systems
Assignee: KM Kabelmetal AG
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Filing: 1969-08-01
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Granted: 1971-10-26
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Expires: 1989-08-01
Abstract
Abstract A method of insulating coaxial tubing systems for conveying heated or cooled gaseous or liquid materials by forming in situ a foamed insulating body disposed between the coaxial tubing members as they are formed.
Inventors
- 👤 Gunther Lehnert
- 👤 Gerhard Karl Ziemekm
- 👤 Fritz Otto Glander
- 👤 Bern Otto Eilhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:06
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/334; B29C44/321; B29C44/3215; B29C44/322; B29C44/324; F; F16; F16L; F16L59/00; F16L59/14; F16L59/153; B29L; B29L2023/00; B29L2023/22; B29L2023/225
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A method as in Claim 1 wherein said outer tubular member comprises a metal tape, folding said metal tape into tubular form with the longitudinal edges thereof adjacent each other, and forming a longitudinal seam between said tape edges.
Claim 2
Dependent Claim
23 words
A method as in Claim 2 wherein said carrier tape is metal and said composition is foamed in advance of said corrugating operation.
Claim 3
Dependent Claim
23 words
A method as in claim 3 wherein said carrier metal tape has a thickness of from about 0.02 mm. to about 0.7 mm.
Claim 4
Dependent Claim
21 words
A method as in claim 1 wherein said carrier tape is paper and said composition is foamed after said corrugating operation.
Claim 5
Dependent Claim
12 words
A method as in Claim 5 wherein said paper tape is crimped.
Claim 6
Dependent Claim
21 words
A method as in Claim 1 wherein foam forming composition is deposited between said tape carrier and said outer tubular member.
Claim 7
Dependent Claim
37 words
A method as in Claim 1 wherein the longitudinal edges of said tape carrier are spaced to form a longitudinal slot for allowing foam forming composition to pass between said tape carrier and said outer tubular member.
Claim 8
Dependent Claim
12 words
A method as in Claim 1 wherein said composition is a polyurethane.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |