Patent US2855944A successfully refreshed from Google Patents.
US2855944A
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Control valve for automatic regeneration system
Assignee: FRASER AND ALBIN
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Filing: 1953-12-03
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Granted: 1958-10-14
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Expires: 1973-12-03
Abstract
No abstract record available.
Inventors
- 👤 Benjamin D Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; F; F16; F16K; F16K31/00; F16K31/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2559; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7439; Y10T137/7488; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86879; Y10T137/877; Y10T137/87708
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US207615A
Cited
US1976439A
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US2396809A
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US2539748A
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US2670328A
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US2715098A
Cited
US2751347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |