Patent DE2155488C3 successfully refreshed from Google Patents.
US3374155A
Expired / Lapsed
US
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Modified oxide-coated aluminum and the method of modifying
Assignee: LUDWIG J WEBER
•
Filing: 1965-02-19
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Granted: 1968-03-19
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Expires: 1985-02-19
Abstract
No abstract record available.
Inventors
- 👤 Ludwig J Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:05
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |