US3486954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for etching aluminum
Assignee: McDonnell Douglas Corp
•
Filing: 1966-02-07
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Granted: 1969-12-30
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Expires: 1986-02-07
Abstract
No abstract record available.
Inventors
- 👤 James A Ashcraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; C01B33/26; C01B33/40; C01B33/46; C23; C23F; C23F1/00; C23F1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2311047A
Cited
US2650875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |