US2863726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the joint manufacture of portland cement and sulfur
Assignee: Individual
•
Filing: 1955-03-31
•
Granted: 1958-12-09
•
Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/02; C04B7/04; C01; C01B; C01B17/00; C01B17/02; C01B17/06; C01B17/16; C01B17/164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE JOINT MANUFACTURE OF PORTLAND CEMENT CLINKER, SULFUR AND HYDROGEN SULFIDE WHICH COMPRISES THE STEPS OF: (A) FEEDING A MIXTURE OF A CALCIUM SULFATE-CONTAINING RAW MATERIAL, A SOURCE OF ALIMUNA AND A SOURCE OF SILICA, IN PROPORTIONS TO PRODUCE PORTLAND CEMENT CLINKER, TO A ROTARY KILN AND BURNING SAID MIXTURE IN A REDUCING ATMOSPHERE CONTAINING CARBON MONOXIDE TO PRODUCE A CALCINE CONTAINING CALCIUM SULFIDE AND KILN GASES CONTAINING SULFUR AND HYDROGEN SULFIDE; (B) RECOVERING SULFUR AND HYDROGEN SULFIDE FROM THE KILM GASES OF SAID BURNING; AND (C) BURNING THE CALCINE FROM STEP (A) IN A SECOND ROTARY KILN IN AN OXIDIZING ATMOSPHERE TO A STATE OF INCIPIENT FUSION TO OXIDIZE THE CALCIUM SULFIDE TO CALCIUM SULFATE AND TO OBTAIN A PORTLAND CEMENT CLINKER.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE JOINT MANUFACTURE OF PORTLAND CEMENT CLINKER, SULFUR AND HYDROGEN SULFIDE WHICH COMPRISES THE STEPS OF: (A) FEEDING A MIXTURE OF A CALCIUM SULFATE-CONTAINING RAW MATERIAL, A SOURCE OF ALIMUNA AND A SOURCE OF SILICA, IN PROPORTIONS TO PRODUCE PORTLAND CEMENT CLINKER, TO A ROTARY KILN AND BURNING SAID MIXTURE IN A REDUCING ATMOSPHERE CONTAINING CARBON MONOXIDE TO PRODUCE A CALCINE CONTAINING CALCIUM SULFIDE AND KILN GASES CONTAINING SULFUR AND HYDROGEN SULFIDE; (B) RECOVERING SULFUR AND HYDROGEN SULFIDE FROM THE KILM GASES OF SAID BURNING; AND (C) BURNING THE CALCINE FROM STEP (A) IN A SECOND ROTARY KILN IN AN OXIDIZING ATMOSPHERE TO A STATE OF INCIPIENT FUSION TO OXIDIZE THE CALCIUM SULFIDE TO CALCIUM SULFATE AND TO OBTAIN A PORTLAND CEMENT CLINKER.
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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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |