US3478554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated sheet metal and method of forming the same
Assignee: Alcoa Corp
•
Filing: 1967-05-26
•
Granted: 1969-11-18
•
Expires: 1987-05-26
Abstract
No abstract record available.
Inventors
- 👤 John N Demsey
- 👤 Vernon C Heffran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124232A
Cited
US2182304A
Cited
US2308530A
Cited
GB1004836A
Cited
BE639783A
Cited
US3250103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |