Patent US2756157A successfully refreshed from Google Patents.
US2756157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of monocrystalline rutile
Assignee: NL Industries Inc
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Filing: 1953-08-12
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Granted: 1956-07-24
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Expires: 1973-08-12
Abstract
No abstract record available.
Inventors
- 👤 Malcolm D Beals
- 👤 James F Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:09
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A SINGLE CRYSTAL FO SYNTHETIC RUTILE CONSISTING ESSENTIALLY OF TITANIA AND FROM ABOUT 0.05% TO ABOUT 1.0% OF AN OXIDIC COMPOUND OF GALLIUM.
Claim 2
Dependent Claim
23 words
A SINGLE CRYSTAL FO SYNTHETIC RUTILE CONSISTING ESSENTIALLY OF TITANIA AND FROM ABOUT 0.05% TO ABOUT 1.0% OF AN OXIDIC COMPOUND OF GALLIUM.
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |