US3098043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etchant for molybdenum
Assignee: Unisys Corp
•
Filing: 1961-08-17
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Granted: 1963-07-16
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Expires: 1981-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Douglas C Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:45
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
AN AQUEOUS SOLUTION FOR ETCHING MOLYBDENUM COMPRISING WATER, 0.91 TO 1.5 MOLES PER LITER OF AN ALKALI METAL FERRICYANIDE, .075 TO 1.25 MOLES PER LITER OF AN ALKALI METAL HYDROXIDE AND .00375 TO .045 MOLES PER LITER OF AN ALKALI METAL OXALATE.
Claim 2
Dependent Claim
42 words
AN AQUEOUS SOLUTION FOR ETCHING MOLYBDENUM COMPRISING WATER, 0.91 TO 1.5 MOLES PER LITER OF AN ALKALI METAL FERRICYANIDE, .075 TO 1.25 MOLES PER LITER OF AN ALKALI METAL HYDROXIDE AND .00375 TO .045 MOLES PER LITER OF AN ALKALI METAL OXALATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |