US2828537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing armoured synthetic plastic tubes, vessels or shaped pieces
Assignee: Dynamit Actien Gesellschaft Vormals Alfred Nobel & Co
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Filing: 1954-01-25
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Granted: 1958-04-01
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Pischke Johannes
- 👤 Primessing Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
F; F02; F02K; F02K9/00; Y; Y10; Y10S; Y10S74/00; Y10S74/10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18128; Y10T74/18136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF MAKING A HOLLOW COMPOSITE PLASTIC LINED BODY CAPABLE OF WITHSTANDING LOW TEMPERATURES, COMPRISING THE STEPS OF PLACING AN ELONGATED TUBULAR LINER OF SYNTHETIC RESILIENT PLASTIC WITHIN A TUBULAR REINFORCING JACKET OF A MATERIAL HAVING A SMALLER COEFFICIENT OF THERMAL EXPANSION AND CONTRACTION THAN SAID LINER; PRESSING THE ENDS OF THE LINER TOWARD EACH OTHER SUFFICIENT TO SHORTEN PERMANENTLY THE LENGTH OF THE LINER AND TO PRESS THE LINER OUTWARDLY AGAINST THE JACKET; AND PERMANENTLY REDUCING THE DIAMETER OF THE JACKET BY PRESSING THE SAME INWARDLY SUFFICIENTLY TO DEFORM THE JACKET AND ELONGATE THE SAME TOGETHER WITH THE LINER TO AN EXTENT WHICH LEAVES IN THE FINISHED HOLLOW COMPOSITE PLASTIC LINED BODY A RESIDUAL LINER STRESS TENDING TO EXPAND THE SAME SUFFICIENTLY
Claim 2
Independent Claim
124 words
A METHOD OF MAKING A HOLLOW COMPOSITE PLASTIC LINED BODY CAPABLE OF WITHSTANDING LOW TEMPERATURES, COMPRISING THE STEPS OF PLACING AN ELONGATED TUBULAR LINER OF SYNTHETIC RESILIENT PLASTIC WITHIN A TUBULAR REINFORCING JACKET OF A MATERIAL HAVING A SMALLER COEFFICIENT OF THERMAL EXPANSION AND CONTRACTION THAN SAID LINER; PRESSING THE ENDS OF THE LINER TOWARD EACH OTHER SUFFICIENT TO SHORTEN PERMANENTLY THE LENGTH OF THE LINER AND TO PRESS THE LINER OUTWARDLY AGAINST THE JACKET; AND PERMANENTLY REDUCING THE DIAMETER OF THE JACKET BY PRESSING THE SAME INWARDLY SUFFICIENTLY TO DEFORM THE JACKET AND ELONGATE THE SAME TOGETHER WITH THE LINER TO AN EXTENT WHICH LEAVES IN THE FINISHED HOLLOW COMPOSITE PLASTIC LINED BODY A RESIDUAL LINER STRESS TENDING TO EXPAND THE SAME SUFFICIENTLY
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |