Patent US2957827A successfully refreshed from Google Patents.
US2957827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making single crystal garnets
Assignee: AT&T Inc
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Filing: 1957-04-30
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Granted: 1960-10-25
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Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 James W Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:19
CPC Classifications
C; C30; C30B; C30B9/00; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/28; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/906; Y10S117/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE METHOD OF GROWING SINGLE CRYSTALS OF SYNTHETIC GARNET MATERIALS OF THE FORMULA
Claim 2
Independent Claim
13 words
THE METHOD OF GROWING SINGLE CRYSTALS OF SYNTHETIC GARNET MATERIALS OF THE FORMULA
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |