Patent US3248669A successfully refreshed from Google Patents.
US3248669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor laser with optical cavity
Assignee: International Business Machines Corp
•
Filing: 1962-10-30
•
Granted: 1966-04-26
•
Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 William P Dumke
- 👤 Rudolph R Haering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:35
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3121203A
Cited
US3059117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |