US2902719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of easily friable crystalline substances by a melt casting process
Assignee: Diamond Shamrock Corp
•
Filing: 1955-01-07
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Granted: 1959-09-08
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Expires: 1975-01-07
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Hindes
- 👤 Henry S Curtis
- 👤 James R Siemoneit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:59
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF CRYSTALLIZING A MOLTEN MATERIAL INTO A PRODUCT CHARACTERIZED BY IMPROVED GRINDABILITY AND FRIABILITY, SAID METHOD COMPRISING DEPOSITION SAID MATERIAL IN A MOLTEN CONDITION AS A THIN LAYR AND TRANSPORTING SAID MATERIAL THROUGH A ZONE OF SUPERCOOLING WHEREIN SAID MATERIAL IS PASSED SUCCESSIVELY THROUGH A QUIESCENT POOL OF THE SEMI-CRYSTALLIZED MATERIAL BEING TRANSPORTED, IN CONTACT WITH STATIONARY MASSES OF SOLDIFIED CRYSTALS OF THE MATERIAL BEING TRANSPORTED, THEREAFTER AGITATING SAID SURFACE HEATING THE MATERIAL IN A THIN LAYER, AND SPREADING THE THUS SUPERCOOLED LIQUID MATERIAL TO A CONTROLLED THICKNESS AND ALLOWING IT TO SOLIDIFY IN A THIN BRITTLE LAYER.
Claim 2
Independent Claim
100 words
A METHOD OF CRYSTALLIZING A MOLTEN MATERIAL INTO A PRODUCT CHARACTERIZED BY IMPROVED GRINDABILITY AND FRIABILITY, SAID METHOD COMPRISING DEPOSITION SAID MATERIAL IN A MOLTEN CONDITION AS A THIN LAYR AND TRANSPORTING SAID MATERIAL THROUGH A ZONE OF SUPERCOOLING WHEREIN SAID MATERIAL IS PASSED SUCCESSIVELY THROUGH A QUIESCENT POOL OF THE SEMI-CRYSTALLIZED MATERIAL BEING TRANSPORTED, IN CONTACT WITH STATIONARY MASSES OF SOLDIFIED CRYSTALS OF THE MATERIAL BEING TRANSPORTED, THEREAFTER AGITATING SAID SURFACE HEATING THE MATERIAL IN A THIN LAYER, AND SPREADING THE THUS SUPERCOOLED LIQUID MATERIAL TO A CONTROLLED THICKNESS AND ALLOWING IT TO SOLIDIFY IN A THIN BRITTLE LAYER.
References Cited (Backward Citations)
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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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |