US3769393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flaring plastic pipe
Assignee: Reed Manufacturing Co
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Filing: 1972-04-11
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Granted: 1973-10-30
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Expires: 1992-04-11
Abstract
Abstract A method of flaring thermoplastic pipe such as polybutylene, polyethylene, polyvinyl, etc used for domestic water service in which the flaring is accomplished by a spinning tool rotated about the axis of the pipe. The flare is effected by local deformation accompanied by heating by internal and external friction in the plastic which overcomes the memory of the plastic. The flare may fit a standard compression or recessed fitting.
Inventors
- 👤 B Bjalme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:13
CPC Classifications
B; B29; B29C; B29C57/00; F; F16; F16L; F16L33/00; F16L33/006
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |