US3053969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for metal structural panel construction
Assignee: Electric Furnace Co
•
Filing: 1959-04-02
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Granted: 1962-09-11
•
Expires: 1979-04-02
Abstract
No abstract record available.
Inventors
- 👤 Elmer L Kerr
- 👤 Cope F Troy
- 👤 Pettit Arch Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:58
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1469043A
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US1863073A
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US2984732A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |