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US2984901A
Expired / Lapsed
US
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Method of making composite metal strips
Assignee: Engelhard Industries Inc
•
Filing: 1955-03-10
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Granted: 1961-05-23
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Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Alexander Y Cunningham
- 👤 William F Mittendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K20/00; B23K20/04
Claims Analysis
Total Claims: 0
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |