Patent US3487331A successfully refreshed from Google Patents.
US3487331A
Expired / Lapsed
US
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Q-switched laser light sources
Assignee: National Research Development Corp UK
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Filing: 1966-05-09
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Granted: 1969-12-30
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Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 John William Charles Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/121; H01S3/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3315177A
Cited
US3281712A
Cited
US3274512A
Cited
US3388343A
Cited
US3398379A
Cited
US3393374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |