US3138504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing rutile
Assignee: Lockheed Martin Corp
•
Filing: 1960-09-15
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Granted: 1964-06-23
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Expires: 1980-09-15
Abstract
No abstract record available.
Inventors
- 👤 Ross A Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD OF PARTIALLY REDUCING SUBSTANTIALLY STOICHIOMETRIC RUTILE TO CHANGE THE ELECTRICAL PROPERTIES THEREOF WHICH COMPRISES SANDWICHING A THIN LAYER OF SALT CONSISTING ESSENTIALLY OF AT LEAST ONE CHOSEN FROM THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METAL HALIDES BETWEEN A LAYER OF TITANIUM AND A SURFACE OF STOICHIOMETRIC RUTILE WHICH IS TO BE REDUCED, AND THEN HEATING THE RESULTING SANDWICH ASSEMBLY IN AN AIR ENVIROMENT TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO MELT THE SALT AND REDUCE THE STOICHIOMETRIC RUTILE BY THE AMOUNT DESIRED, THE THICKNESS OF THE LAYER OF SALT BEING SUFFICIENT TO PROVIDE A LIQUID BOUNDARY BETWEEN SAID LAYER OF TITANIUM AND SAID SURFACE OF STOICHIOMETRIC RUTILE.
Claim 2
Independent Claim
114 words
A METHOD OF PARTIALLY REDUCING SUBSTANTIALLY STOICHIOMETRIC RUTILE TO CHANGE THE ELECTRICAL PROPERTIES THEREOF WHICH COMPRISES SANDWICHING A THIN LAYER OF SALT CONSISTING ESSENTIALLY OF AT LEAST ONE CHOSEN FROM THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METAL HALIDES BETWEEN A LAYER OF TITANIUM AND A SURFACE OF STOICHIOMETRIC RUTILE WHICH IS TO BE REDUCED, AND THEN HEATING THE RESULTING SANDWICH ASSEMBLY IN AN AIR ENVIROMENT TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO MELT THE SALT AND REDUCE THE STOICHIOMETRIC RUTILE BY THE AMOUNT DESIRED, THE THICKNESS OF THE LAYER OF SALT BEING SUFFICIENT TO PROVIDE A LIQUID BOUNDARY BETWEEN SAID LAYER OF TITANIUM AND SAID SURFACE OF STOICHIOMETRIC RUTILE.
References Cited (Backward Citations)
US2289211A
Cited
US2369266A
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US2807539A
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US2886682A
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US2834667A
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US3044968A
Cited
US3022201A
Cited
US3105800A
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |