US3067321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrically heating and forming cylindrical members
Assignee: Individual
•
Filing: 1961-04-11
•
Granted: 1962-12-04
•
Expires: 1981-04-11
Abstract
No abstract record available.
Inventors
- 👤 Westin Sven
- 👤 Westin Axel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:01
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04; B23; B23K; B23K11/00; B23K11/002; H; H05; H05B; H05B3/00; H05B3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |