US3306962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic corrugated pipe
Assignee: BUILDING PRODUCTS OF CANADA LT
•
Filing: 1965-03-29
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Granted: 1967-02-28
•
Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Kenneth V Pepper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:12
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0015; B29C48/00; B29C48/03; B29C48/09; B29C48/13; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/12; B29L; B29L2023/00; B29L2023/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR THE MANUFACTURE OF A HELICALLY CORRUGATED TUBE COMPRISING THE STEPS OF DEPOSITING SETTABLE PLASTIC MATERIAL IN UNSET CONDITION UPON A SURFACE OF A MANDREL HAVING A HELICAL THREAD FORM TO CONFORM TO THE THREAD FORM OF SAID MANDREL SURFACE, SECURING SAID PLASTIC MATERIAL AFTER SETTING THEREOF AGAINST ROTATION ABOUT THE AXIS OF SAID MANDREL, AND ROTATING SAID MANDREL ABOUT ITS LONGITUDINAL AXIS TO FEED SAID PLASTIC MATERIAL FROM SAID MANDREL.
Claim 2
Independent Claim
73 words
A METHOD FOR THE MANUFACTURE OF A HELICALLY CORRUGATED TUBE COMPRISING THE STEPS OF DEPOSITING SETTABLE PLASTIC MATERIAL IN UNSET CONDITION UPON A SURFACE OF A MANDREL HAVING A HELICAL THREAD FORM TO CONFORM TO THE THREAD FORM OF SAID MANDREL SURFACE, SECURING SAID PLASTIC MATERIAL AFTER SETTING THEREOF AGAINST ROTATION ABOUT THE AXIS OF SAID MANDREL, AND ROTATING SAID MANDREL ABOUT ITS LONGITUDINAL AXIS TO FEED SAID PLASTIC MATERIAL FROM SAID MANDREL.
References Cited (Backward Citations)
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Cited
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Cited
US2396059A
Cited
US2620514A
Cited
US2566846A
Cited
GB716183A
Cited
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Cited
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Cited
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Cited
US3169272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |