Patent US3425531A successfully refreshed from Google Patents.
Patent US3132980A successfully refreshed from Google Patents.
US3132980A
Expired / Lapsed
US
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Method of manufacturing non-metallic tubing
Assignee: Smiths America Corp
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Filing: 1958-10-30
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Granted: 1964-05-12
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Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Desmond Eric
- 👤 Ronald C Major
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF MANUFACTURING TUBING WITH AT LEAST ONE WALL OF A FLEXIBLE NON-METALLIC MATERIAL FORMED OF A POLYMERIZED ORGANIC SUBSTANCE COMPRISING THE STEPS OF HELICALLY WRAPPING METALLIC STRIP ON A MANDREL IN OVERLAPPING CONVOLUTIONS TO FORM A FIRST TEMPORARY SUPPORTING LAYER, THE SAID METALLIC STRIP BEING READILY SOLUBLE IN A SOLVENT WHICH DOES NOT ACT ON THE SAID FLEXIBLE MATERIAL, HELICALLY WRAPPING THE FLEXIBLE MATERIAL IN STRIP FORM IN OVERLAPPING CONVOLUTIONS OVER THE FIRST TEMPORARY LAYER TO FORM A LAYER WHICH WILL CONSTITUTE THE SAID WALL, FORMING OVER THE LAYER OF FLEXIBLE MATERIAL A SECOND TEMPORARY SUPPORTING
Claim 2
Independent Claim
98 words
A METHOD OF MANUFACTURING TUBING WITH AT LEAST ONE WALL OF A FLEXIBLE NON-METALLIC MATERIAL FORMED OF A POLYMERIZED ORGANIC SUBSTANCE COMPRISING THE STEPS OF HELICALLY WRAPPING METALLIC STRIP ON A MANDREL IN OVERLAPPING CONVOLUTIONS TO FORM A FIRST TEMPORARY SUPPORTING LAYER, THE SAID METALLIC STRIP BEING READILY SOLUBLE IN A SOLVENT WHICH DOES NOT ACT ON THE SAID FLEXIBLE MATERIAL, HELICALLY WRAPPING THE FLEXIBLE MATERIAL IN STRIP FORM IN OVERLAPPING CONVOLUTIONS OVER THE FIRST TEMPORARY LAYER TO FORM A LAYER WHICH WILL CONSTITUTE THE SAID WALL, FORMING OVER THE LAYER OF FLEXIBLE MATERIAL A SECOND TEMPORARY SUPPORTING
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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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |