US2990261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of boron compact
Assignee: AT&T Inc
•
Filing: 1958-12-11
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Granted: 1961-06-27
•
Expires: 1978-12-11
Abstract
No abstract record available.
Inventors
- 👤 Earl S Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/023; C30; C30B; C30B13/00; C30B29/00; C30B29/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
METHOD OF PRODUCING A CRYSTALLINE BODY CONSISTING ESSENTIALLY OF BORON COMPRISING DISPOSING AN ELONGATED BODY CONSISTING ESSENTIALLY OF BORON PARTICLES IN A MATRIX OF BORON TRIOXIDE IN A SUBSTANTIALLY VERTICAL POSITION, SAID BODY BEING SUPPORTED SOLELY AT ITS EXTREMITIES, AND PRODUCING A MOVING MOLTEN ZONE EXTENDING THROUGH THE
Claim 2
Dependent Claim
48 words
METHOD OF PRODUCING A CRYSTALLINE BODY CONSISTING ESSENTIALLY OF BORON COMPRISING DISPOSING AN ELONGATED BODY CONSISTING ESSENTIALLY OF BORON PARTICLES IN A MATRIX OF BORON TRIOXIDE IN A SUBSTANTIALLY VERTICAL POSITION, SAID BODY BEING SUPPORTED SOLELY AT ITS EXTREMITIES, AND PRODUCING A MOVING MOLTEN ZONE EXTENDING THROUGH THE
References Cited (Backward Citations)
US2747971A
Cited
US2789039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |