Method of applying corrosion and mechanical protective coatings in form of tapes to a metal pipe
Abstract
Abstract A METHOD OF COATING A PIPE AND A PIPE COATED THEREBY, SAID METHOD COMPRISING THE STEPS OF PROGRESSIVELY SPIRALLY WINDING A CORROSION PROTECTIVE ADHESIVE COATED PLASTIC TAPE ONTO THE OUTER SURFACE OF THE PIPE WITH A SPIRAL OVERLAP, COVERING THE COATED PIPE BY PROGRESSIVELY WINDING A FILM THEREON WITH A PREDETERMINED OVERLAP, AND, AS THE FILM IS WOUND ONTO THE COATED PIPE, INTRODUCING AND DISTRIBUTING UNDER PRESSURE A HOT MELTED ADHESIVE INTO INTIMATE CONTACT WITH THE SURFACE OF THE MARGINAL PORTION OF THE TRAILING EDGE OF THE FILM AND THE SURFACES OF THE OVERLAPPED PORTION ALONG THE LEADING EDGE THEREOF AND OF THE PORTION OF THE TAPE IMMEDIATELY ADJACENT THE LEADING EDGE OF THE FILM.
Inventors
- 👤 Ralph Hielema
Bibliographic Details
Claims Analysis
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |