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Patent US3529232A successfully refreshed from Google Patents.
US3529232A
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Method and apparatus for frequency-to-frequency conversion
Assignee: Pharmacia and Upjohn Co
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Filing: 1968-05-31
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Granted: 1970-09-15
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Expires: 1988-05-31
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Porter
- 👤 Kenneth E Graves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/18; G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01R; G01R23/00; G01R23/02; H03K; H03K7/00; H03K7/06
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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |