Patent US154006A successfully refreshed from Google Patents.
US3258718A
Expired / Lapsed
US
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Semiconductor infrared maser
Assignee: Massachusetts Institute of Technology
•
Filing: 1963-02-07
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Granted: 1966-06-28
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Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Zeiger
- 👤 Robert J Keyes
- 👤 William E Krag
- 👤 Benjamin Lax
- 👤 Alan L Mcwhorter
- 👤 Theodore M Quist
- 👤 Robert H Rediker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/32
Claims Analysis
Total Claims: 0
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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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |