US3630906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gallium arsenide
Assignee: Bell and Howell Co
•
Filing: 1969-10-02
•
Granted: 1971-12-28
•
Expires: 1989-10-02
Abstract
Abstract D R A W I N G GALLIUM ARSENIDE HAVING REDUCED LATTICE DEFECT CONCENTRATIONS AND ENCHANCED ELECTRICAL PROPERTIES.
Inventors
- 👤 Robert K Willardson
- 👤 Worth P Allred
- 👤 James E Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/85; H10P; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |