Patent US3522552A successfully refreshed from Google Patents.
US3522552A
Expired / Lapsed
US
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Semiconductor laser unit
Assignee: International Standard Electric Corp
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Filing: 1968-03-26
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Granted: 1970-08-04
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Expires: 1988-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Nash Knight Willmott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/024; H01S5/30; H01S5/022; H01S5/0235; H01S5/02355; H01S5/02365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |