US3554999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a shrink device
Assignee: Shaw Pipe Protection Ltd
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Filing: 1966-07-14
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Granted: 1971-01-12
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Expires: 1986-07-14
Abstract
Abstract A METHOD FOR MAKING A HEAT SHRINKABLE TUBING FROM AN EXTRUDED CROSS-LINKABLE POLYMERIC ATERIAL INCLUDING THE STEPS OF CURING THE TUBING AT A TEMPERATURE ABOVE ITS CRYSTALLINE MELTING POINT TO GIVE CROSS-LINKING OF THE MATERIAL SUFFICIENT TO PROVIDE A PREDETERMINED ELASTIC MEMORY IN THE FINISHED TUBING, APPLYING A UNIFORM ADHESIVE COATING TO THE INTERIOR SURFACE OF THE TUBING, AND EXPANDING THE COATED TUBING AT A TEMPERATURE ABOVE ITS CRYSTALLINE MELTING POINT WHILE MAINTAINING THE UNIFORMITY CHARACTERISTICS OF THE COATING TO SET THE TUBING WITH A PREDETERMINED SHRINK-BACK FROM ITS FULLY EXPANDED DIMENSION.
Inventors
- 👤 Leslie E Shaw
- 👤 Peter M Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:27
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/18; F16L58/181; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0616; B29C61/0666; B29C61/08; B29C2061/0675; Y; Y10; Y10S; Y10S174/00; Y10S174/08
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |