US3034916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of oxidizing titanium metal
Assignee: Individual
•
Filing: 1959-04-06
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Granted: 1962-05-15
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Allen J Eshner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:36
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C8/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A METHOD OF OXIDIZING A TITANIUM METAL LAYER IN AIR ONTO A MAGNESIUM FLUORIDE SURFACE HAVING A LOW INDEX OF REFRACTION FOR AN OPTICAL DEVICE, THE STEPS WHICH INCLUDE PRELIMINARILY OXIDIZING SAID METAL LAYER AT A TEMPERATURE OF THE ORDER OF 820*F. FOR A TIME OF THE ORDER OF 35 MINUTES, COOLING SAID SURFACE TO A TEMPERATURE OF ABOUT 400*F. AND COMPLETING SAID OXIDATION AT A TEMPERATURE OF THE ORDER OF 820*F.
Claim 2
Dependent Claim
73 words
IN A METHOD OF OXIDIZING A TITANIUM METAL LAYER IN AIR ONTO A MAGNESIUM FLUORIDE SURFACE HAVING A LOW INDEX OF REFRACTION FOR AN OPTICAL DEVICE, THE STEPS WHICH INCLUDE PRELIMINARILY OXIDIZING SAID METAL LAYER AT A TEMPERATURE OF THE ORDER OF 820*F. FOR A TIME OF THE ORDER OF 35 MINUTES, COOLING SAID SURFACE TO A TEMPERATURE OF ABOUT 400*F. AND COMPLETING SAID OXIDATION AT A TEMPERATURE OF THE ORDER OF 820*F.
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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |