Patent US2858211A successfully refreshed from Google Patents.
US2858211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wood chip digestion
Assignee: Condi Engineering Corp
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Filing: 1956-02-13
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Granted: 1958-10-28
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Expires: 1976-02-13
Abstract
No abstract record available.
Inventors
- 👤 Leonard G Durant
- 👤 James E Irvine
- 👤 Rohe V Pennington
- 👤 Surino Alphonse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:22
CPC Classifications
D; D21; D21C; D21C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
CONTINUOUSLY OPERABLE WOOD-CHIP DIGESTING APPARATUS WHICH COMPRISES A SYSTEM HAVING A COMBINED STEAMING AND IMPREGNATING TANK ENCLOSED FOR HOLDING A POND OF COOKING LIQUOR OVERLAIN BY A STEAM ATMOSPHERE AND HAVING A CENTRAL BOTTOM OUTLET, MEANS FOR REGULATABLY SUPPLYING STEAM TO THE TANK, MEANS FOR REGULATABLY FEEDING CHIPS TO THE STEAM ATMOSPHERE, MEANS FOR FEEDING SUCH LIQUOR TO THE POND, MEANS FOR MAINTAINING A CONSTANT LIQUIDLEVEL ON THE POND, MEANS FOR EVACUATING CHIPS FROM THE TANK, A CHIP DRAINER, MEANS FOR REGULATING THE PASSING TO THE DRAINER OF EVACUATED IMPREGNATED CHIPS IMMERSED IN LIQUOR, A CHIP DIGESTER UNDER PRESSURE ENCLOSING A STEAM ATMOSPHERE AND HAVING A CENTRAL BOTTOM OUTLET MEANS FOR REGULATABLY PASSING CHIPS FROM THE DRAINER TO THE DIGESTER, MEANS FOR SUPPLYING STEAM TO THE DIGESTER FOR CONTROLLING ITS TEMPERATURE, MEANS FOR EVACUATING CHIPS FROM THE DIGESTER, AND MEANS FOR EJECTING EVACUATED DIGESTED CHIPS FROM THE SYSTEM, WHEREIN THE EVACUATING MEANS
Claim 2
Dependent Claim
152 words
CONTINUOUSLY OPERABLE WOOD-CHIP DIGESTING APPARATUS WHICH COMPRISES A SYSTEM HAVING A COMBINED STEAMING AND IMPREGNATING TANK ENCLOSED FOR HOLDING A POND OF COOKING LIQUOR OVERLAIN BY A STEAM ATMOSPHERE AND HAVING A CENTRAL BOTTOM OUTLET, MEANS FOR REGULATABLY SUPPLYING STEAM TO THE TANK, MEANS FOR REGULATABLY FEEDING CHIPS TO THE STEAM ATMOSPHERE, MEANS FOR FEEDING SUCH LIQUOR TO THE POND, MEANS FOR MAINTAINING A CONSTANT LIQUIDLEVEL ON THE POND, MEANS FOR EVACUATING CHIPS FROM THE TANK, A CHIP DRAINER, MEANS FOR REGULATING THE PASSING TO THE DRAINER OF EVACUATED IMPREGNATED CHIPS IMMERSED IN LIQUOR, A CHIP DIGESTER UNDER PRESSURE ENCLOSING A STEAM ATMOSPHERE AND HAVING A CENTRAL BOTTOM OUTLET MEANS FOR REGULATABLY PASSING CHIPS FROM THE DRAINER TO THE DIGESTER, MEANS FOR SUPPLYING STEAM TO THE DIGESTER FOR CONTROLLING ITS TEMPERATURE, MEANS FOR EVACUATING CHIPS FROM THE DIGESTER, AND MEANS FOR EJECTING EVACUATED DIGESTED CHIPS FROM THE SYSTEM, WHEREIN THE EVACUATING MEANS
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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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |