US3263476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal forming process for shaping ends of tubes and the product thereof
Assignee: Spectrum Brands Inc
•
Filing: 1965-03-15
•
Granted: 1966-08-02
•
Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Hinderer Gottlob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:25
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02; B21D41/025; F; F16; F16L; F16L19/00; F16L19/02; F16L19/025; F16L19/028; F16L19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A PUNCH FOR FOLDING AND CONSTRICTING THE END OF A METALLIC TUBE: AN OUTER SLEEVE HAVING AT ITS ACTIVE END A CONCAVE SURFACE FORMING A SPHERICAL ZONE; AND A CYLINDRICAL PUNCH MEMBER LOCATED CONCENTRICALLY AT THE AXIS OF THE ZONE, AND PROJECTING OUTWARDLY BEYOND THE SURFACE; SAID SURFACE HAVNG AN OUTER LARGER CIRCULAR END AND AN INNER SMALLER CIRCULAR END, THE OUTER CIRCULAR END HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE SPHERICAL DIAMETER OF THE ZONE.
Claim 2
Dependent Claim
77 words
IN A PUNCH FOR FOLDING AND CONSTRICTING THE END OF A METALLIC TUBE: AN OUTER SLEEVE HAVING AT ITS ACTIVE END A CONCAVE SURFACE FORMING A SPHERICAL ZONE; AND A CYLINDRICAL PUNCH MEMBER LOCATED CONCENTRICALLY AT THE AXIS OF THE ZONE, AND PROJECTING OUTWARDLY BEYOND THE SURFACE; SAID SURFACE HAVNG AN OUTER LARGER CIRCULAR END AND AN INNER SMALLER CIRCULAR END, THE OUTER CIRCULAR END HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE SPHERICAL DIAMETER OF THE ZONE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |