US3562047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming cylindrical tanks
Assignee: RECH ET APPLIC DES PLASTIQUES
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Filing: 1968-04-11
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Granted: 1971-02-09
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Expires: 1988-04-11
Abstract
Abstract CYLINDERICAL TANKS AND A METHOD OF AND APPARATUS FOR FORMING SUCH TANKS FROM REINFORCED PLASTIC MATERIAL, THE TANKS BEING COMPRISED OF VERTICALLY STACKED CYLINDRICAL SECTIONS. EACH CYLINDRICAL SECTION IS FORMED OF TWO THICKNESSES OF RESIN IMPREGNATED FABRIC WHICH HAVE BEEN SUCCESSIVELY WOUND OVER A MANDREL, THE THICKNESSES BEING VERTICALLY DISPLACED TO PERMIT OVERLAPPING AT THE JOINTS BETWEEN SECTIONS. AS EACH SECTION IS COMPLETED, THE MANDREL IS REDUCED IN DIAMETER AND THE SECTION IS RAISED VERTICALLY.
Inventors
- 👤 Dominique Carlini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:41
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29D; B29D22/00; B29K; B29K2105/00; B29K2105/06
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |