Patent US4574962A successfully refreshed from Google Patents.
JPS5224480A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Semiconductor laser
Assignee: Panasonic Holdings Corp
•
Filing: 1975-08-20
•
Granted: —
•
Expires: 1995-08-20
Abstract
Abstract PURPOSE: Increase reflection index and reduce Jth by forming a semiconductive layer whose forbidden band width is larger than that of active region and which has a large refraction index at one edge of semiconductive active region. COPYRIGHT: (C)1977,JPO&Japio
Inventors
- 👤 Kunio Ito
- 👤 Masaru Kazumura
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
—
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
JPS4866980A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.