Patent US3745079A successfully refreshed from Google Patents.
US3745079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically milling titanium alloy workpieces
Assignee: Boeing North American Inc
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Filing: 1971-04-21
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Granted: 1973-07-10
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Expires: 1991-04-21
Abstract
Abstract APPARATUS AND ETCHANT COMPOSITIONS ARE DISCLOSED FOR CHEMICALLY MILLING TITANIUM ALLOY WORKPIECES TO DEVELOP RECESSED AREAS HAVING NON-UNDERCUT EDGE CHARACTERISTICS.
Inventors
- 👤 D Cowles
- 👤 W Hack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:06
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |