Patent US3463979A successfully refreshed from Google Patents.
US3463979A
Expired / Lapsed
US
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Apparatus for suppressing spurious signals in process control equipment
Assignee: Imperial Chemical Industries Ltd
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Filing: 1966-07-14
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Granted: 1969-08-26
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Expires: 1986-07-14
Abstract
No abstract record available.
Inventors
- 👤 David C H Scobie
- 👤 James Anderson Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:58
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/027; G05B21/00; G05B21/02; G05B9/00; G05B9/02; G05B2219/00; G05B2219/30; G05B2219/36; G05B2219/36526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2684459A
Cited
US2782347A
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US2820935A
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US2846629A
Cited
US3175190A
Cited
US3166691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |