Patent CA543830A successfully refreshed from Google Patents.
US3387477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for roll forming flexible tubing
Assignee: Spectrum Brands Inc
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Filing: 1965-11-29
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Granted: 1968-06-11
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Expires: 1985-11-29
Abstract
No abstract record available.
Inventors
- 👤 Shupper Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:50
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE TUBING IS WORKED UPON BY FORMING ROLLERS 24, 26 AND 28 THAT PROJECT THROUGH SLOTS 18, 10 AND 22 (FIG. 2) IN THE MANDREL. THE MANDREL PREVENTS THE TUBING 10 FROM BULGING AND NO INTERIOR MANDREL IS REQUIRED.
Claim 2
Dependent Claim
39 words
THE TUBING IS WORKED UPON BY FORMING ROLLERS 24, 26 AND 28 THAT PROJECT THROUGH SLOTS 18, 10 AND 22 (FIG. 2) IN THE MANDREL. THE MANDREL PREVENTS THE TUBING 10 FROM BULGING AND NO INTERIOR MANDREL IS REQUIRED.
References Cited (Backward Citations)
US2092873A
Cited
US2486763A
Cited
US2669278A
Cited
GB719821A
Cited
NL91223C
Cited
US3058196A
Cited
US3323339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |