US3527532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital optical frequency shifter
Assignee: Boeing North American Inc
•
Filing: 1967-07-03
•
Granted: 1970-09-08
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 John A Macken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:35
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/48; G01S7/499; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0322; G02F2/00; G02F2/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2988710A
Cited
US3150363A
Cited
US3204104A
Cited
GB1018867A
Cited
US3256443A
Cited
US3304428A
Cited
US3328723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |