US3250836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of artificial stones and other shaped bodies from mineral sulfurous materials
Assignee: Casius Corp Ltd
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Filing: 1962-07-20
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Granted: 1966-05-10
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Ulfstedt Leo Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B28/02; C04B28/04; C04B28/08; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A METHOD FOR THE MANUFACTURE OF STEAM-CURED BODIES FROM A MIXTURE COMPRISING A MINERAL BINDER RICH IN LIME, A SILICEOUS MATERIAL, AND WATER, AT LEAST ONE OF THE INGREDIENTS OF SAID MIXTURE CONTAINING SULFUR IN SULFIDE-BOUND FORM, TREATING SAID BODIES IN A STEEL AUTOCLAVE AT TEMPERATURES BETWEEN 100 AND 250*C., THE IMPROVEMENT WHICH COMPRISES EVACUATING THE ATMOSPHERE PRIOR TO INTRODUCING THE STEAM THEREIN TO REMOVE ELEMENTARY OXYGEN FROM THE AUTOCLAVE AND THEREBY PREVENT THE OXIDATION OF SULFUR AND SULFUROUR COMPOUNDS LIBERATED IN THE STEAM-CURING PROCESS INTO CORROSION-PRODUCING COMPOUNDS.
Claim 2
Dependent Claim
89 words
IN A METHOD FOR THE MANUFACTURE OF STEAM-CURED BODIES FROM A MIXTURE COMPRISING A MINERAL BINDER RICH IN LIME, A SILICEOUS MATERIAL, AND WATER, AT LEAST ONE OF THE INGREDIENTS OF SAID MIXTURE CONTAINING SULFUR IN SULFIDE-BOUND FORM, TREATING SAID BODIES IN A STEEL AUTOCLAVE AT TEMPERATURES BETWEEN 100 AND 250*C., THE IMPROVEMENT WHICH COMPRISES EVACUATING THE ATMOSPHERE PRIOR TO INTRODUCING THE STEAM THEREIN TO REMOVE ELEMENTARY OXYGEN FROM THE AUTOCLAVE AND THEREBY PREVENT THE OXIDATION OF SULFUR AND SULFUROUR COMPOUNDS LIBERATED IN THE STEAM-CURING PROCESS INTO CORROSION-PRODUCING COMPOUNDS.
References Cited (Backward Citations)
FR605359A
Cited
US2382154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |