Patent US2549117A successfully refreshed from Google Patents.
US2549117A
Expired / Lapsed
US
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Fluidized carbonization
Assignee: Standard Oil Development Co
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Filing: 1946-10-02
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Granted: 1951-04-17
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Expires: 1966-10-02
Abstract
No abstract record available.
Inventors
- 👤 Karl J Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:37
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08; C10B49/10; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10; Y; Y10; Y10S; Y10S48/00; Y10S48/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
A PAPER HAVING A WET TENSILE STRENGTH IN EXCESS OF 900 GRAMS AND A WET RUB VALUE ABOVE 5,
Claim 2
Dependent Claim
19 words
A PAPER HAVING A WET TENSILE STRENGTH IN EXCESS OF 900 GRAMS AND A WET RUB VALUE ABOVE 5,
Claim 3
Dependent Claim
146 words
IN THE PROCESS OF CARBONIZING CARBONIZABLE AND CHARACTERIZED IN HAVING A SIZING PREDOMFUELS AT CARBONIZATION CONDITIONS OF TEMPERATURE AND PRESSURE IN THE FORM OF A DENSE TURBULENT INANTLY CONSISTING OF REACTION PRODUCT OF GLYOXAL AND PAPER-MAKER''S MODIFIED STARCH, SAID GLYOXAL BED OF FINELY DIVIDED SOLIDS FLUIDIZED BY AN UPWARDLY FLOWING GAS WHEREIN VOLATILE CARBONIZABEING PRESENT AS ONE-FIFTIETH TO ONE-TWENTIETH BY WEIGHT OF THE DRY WEIGHT OF STARCH. TION PRODUCTS CARRYING ENTRAINED SOLIDS FINES ARE PASSED THROUGH A GAS-SOLIDS SEPARATION ZONE TO REMOVE ENTIRAINED FINELY DIVIDED SOLIDS THEREFROM SAID A HEAT TRANSFER IS PROVIDED FOR BETWEEN SAID BED AND SAID SEPERATION ZONE SUFFICIENT TO PREVENT A SUBSTANTIAL TEMPERATURE DROP BETWEEN SAID BED AND SAID SEPERATION ZONE, THE IMPROVEMENT WHICH COMPRISES PASSING A SEPARATE STREAM OF SOLIDS AT A TEMPERATURE AT LEAST AS HIGH AS THAT PREVAILLING IN SAID BED FROM SAID BED DIRECTLY TO SAID SEPARATION ZONE.
Claim 4
Dependent Claim
146 words
IN THE PROCESS OF CARBONIZING CARBONIZABLE AND CHARACTERIZED IN HAVING A SIZING PREDOMFUELS AT CARBONIZATION CONDITIONS OF TEMPERATURE AND PRESSURE IN THE FORM OF A DENSE TURBULENT INANTLY CONSISTING OF REACTION PRODUCT OF GLYOXAL AND PAPER-MAKER''S MODIFIED STARCH, SAID GLYOXAL BED OF FINELY DIVIDED SOLIDS FLUIDIZED BY AN UPWARDLY FLOWING GAS WHEREIN VOLATILE CARBONIZABEING PRESENT AS ONE-FIFTIETH TO ONE-TWENTIETH BY WEIGHT OF THE DRY WEIGHT OF STARCH. TION PRODUCTS CARRYING ENTRAINED SOLIDS FINES ARE PASSED THROUGH A GAS-SOLIDS SEPARATION ZONE TO REMOVE ENTIRAINED FINELY DIVIDED SOLIDS THEREFROM SAID A HEAT TRANSFER IS PROVIDED FOR BETWEEN SAID BED AND SAID SEPERATION ZONE SUFFICIENT TO PREVENT A SUBSTANTIAL TEMPERATURE DROP BETWEEN SAID BED AND SAID SEPERATION ZONE, THE IMPROVEMENT WHICH COMPRISES PASSING A SEPARATE STREAM OF SOLIDS AT A TEMPERATURE AT LEAST AS HIGH AS THAT PREVAILLING IN SAID BED FROM SAID BED DIRECTLY TO SAID SEPARATION ZONE.
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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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |