US3188751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing building aggregate utilizing sludge residue from paper de-inking process
Assignee: Hydrand Corp
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Filing: 1962-10-29
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Granted: 1965-06-15
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert W Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:55
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C04B18/24; C04B18/241; C04B18/243; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S162/00; Y10S162/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF PRODUCING A BUILDING AGGREGATE INCLUDING AS INGREDIENTS, CARBON , HYDROGEN, SULFUR, OXYGEN, NITROGEN, ASH AND CELLULOSE FROM THE SLUDGE RESIDUE OF A CONVENTIONAL DE-INKING PROCESS EMPLOYED IN PAPER MANUFACTURE AND INCLUDING AS INGREDIENTS, MOISTURE, VOLATILE MATERIALS, FIXED CARBON, ASH AND SULFUR, SAID METHOD, COMPRISING REMOVING THE MAJOR PORTION OF LIQUID FROM SAID SLUDGE, BREAKING THE RESULTANT MATERIAL INTO PARTICLES, CONVEYING SAID PARTICLES THROUGH AN INITIAL DRYING ZONE TO REDUCE THE MOISTURE CONTENT THEREOF TO FROM 18-35%, AGITATING SAID PARTICLES WHILE CONDUCTING THE SAME THROUGH A PLURALITY OF HEATING ZONES, RESPECTIVELY MAINTAINING AT PROGRESSIVELY INCREASED TEMPERATURES WITHIN THE RANGE OF FROM 700*F.2750*F., AND DISCHARGING THE DRIED AND HEATED PRODUCT FROM THE FINAL HEATING ZONE.
Claim 2
Independent Claim
116 words
A METHOD OF PRODUCING A BUILDING AGGREGATE INCLUDING AS INGREDIENTS, CARBON , HYDROGEN, SULFUR, OXYGEN, NITROGEN, ASH AND CELLULOSE FROM THE SLUDGE RESIDUE OF A CONVENTIONAL DE-INKING PROCESS EMPLOYED IN PAPER MANUFACTURE AND INCLUDING AS INGREDIENTS, MOISTURE, VOLATILE MATERIALS, FIXED CARBON, ASH AND SULFUR, SAID METHOD, COMPRISING REMOVING THE MAJOR PORTION OF LIQUID FROM SAID SLUDGE, BREAKING THE RESULTANT MATERIAL INTO PARTICLES, CONVEYING SAID PARTICLES THROUGH AN INITIAL DRYING ZONE TO REDUCE THE MOISTURE CONTENT THEREOF TO FROM 18-35%, AGITATING SAID PARTICLES WHILE CONDUCTING THE SAME THROUGH A PLURALITY OF HEATING ZONES, RESPECTIVELY MAINTAINING AT PROGRESSIVELY INCREASED TEMPERATURES WITHIN THE RANGE OF FROM 700*F.2750*F., AND DISCHARGING THE DRIED AND HEATED PRODUCT FROM THE FINAL HEATING ZONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |