Patent US3838543A successfully refreshed from Google Patents.
US3373771A
Expired / Lapsed
US
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Gas flow modulator valve
Assignee: CONSECO Inc
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Filing: 1965-04-29
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Granted: 1968-03-19
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 John L Boyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:48
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K5/00; F23; F23L; F23L13/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/877; Y10T137/87788; Y10T137/87812
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |