US3280963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic screw conveyor and method of making same
Assignee: Uniroyal Inc
•
Filing: 1964-07-30
•
Granted: 1966-10-25
•
Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Kenneth O Kirker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:22
CPC Classifications
B; B65; B65G; B65G33/00; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/507; B29C48/03; B65G2812/00; B65G2812/05; B65G2812/0505; B65G2812/0511; B65G2812/0516; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF MAKING A PLASTIC SCREW CONVEYOR COMPRISING FORMING A FIRST PLASTIC MEMBER HAVING A SUBSTANTIALLY CYLINDRICAL LONGITUDINAL SURFACE WITH A GROOVE THEREIN EXTENDING HELICALLY AND LONGITUDINALLY OF THE MEMBER, FORMING A PLASTIC TUBULAR HELICAL MEMBER HAVING CONTINUOUS MULTIPLE FLIGHTS AND HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE ROOT DIAMETER OF THE FIRST MEMBER AND HAVING A WIDTH SUBSTANTIALLY THE SAME AS THE WIDTH OF THE GROOVE, AND THE THREADING THE FLIGHTS OF THE HELICAL MEMBER INTO THE GROOVE OF THE FIRST MEMBER TO SEAT THE HELICAL MEMBER IN THE GROOVE TO FORM A SCREW CONVEYOR.
Claim 2
Independent Claim
98 words
THE METHOD OF MAKING A PLASTIC SCREW CONVEYOR COMPRISING FORMING A FIRST PLASTIC MEMBER HAVING A SUBSTANTIALLY CYLINDRICAL LONGITUDINAL SURFACE WITH A GROOVE THEREIN EXTENDING HELICALLY AND LONGITUDINALLY OF THE MEMBER, FORMING A PLASTIC TUBULAR HELICAL MEMBER HAVING CONTINUOUS MULTIPLE FLIGHTS AND HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE ROOT DIAMETER OF THE FIRST MEMBER AND HAVING A WIDTH SUBSTANTIALLY THE SAME AS THE WIDTH OF THE GROOVE, AND THE THREADING THE FLIGHTS OF THE HELICAL MEMBER INTO THE GROOVE OF THE FIRST MEMBER TO SEAT THE HELICAL MEMBER IN THE GROOVE TO FORM A SCREW CONVEYOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |