US3726757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite multiple and incrementally controlled steam chamber for applying dried steam to a pulp mat
Assignee: Individual
•
Filing: 1971-06-28
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Granted: 1973-04-10
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Expires: 1991-06-28
Abstract
Abstract A composite steam chamber extending transversely above a pulp mat for discharging steam down onto the mat; the composite chamber formed of separate individual chambers secured together including one or more central or inner chambers and an end chamber at each end of the composite structure; means for separately delivering steam into each individual chamber; each individual chamber having a bottom wall formed into ridges and valleys extending from one end wall of the chamber to the other, with steam jet orifices in the ridges; and means for drawing off moisture collecting in the valleys of each individual chamber.
Inventors
- 👤 J Dupasquier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |