US2522548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a phosphate gel and mold with phosphate gel binder
Assignee: Individual
•
Filing: 1946-10-03
•
Granted: 1950-09-19
•
Expires: 1966-10-03
Abstract
No abstract record available.
Inventors
- 👤 Johann S Streicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:51
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/185; B22C1/183; C; C04; C04B; C04B28/00; C04B28/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A PROCESS FOR FORMING A REFRACTORY MOLD, THE STEPS COMPRISING PREPARING A SOLUTION OF A PRIMARY ALKALI METAL PHOSPHATE AND A PRIMARY PHOSPHATE OF A METAL CAPABLE OF FORMING INSOLUBLE SECONDARY AND TERTIARY PHOSPHATES, AND MIXING SAID SOLUTION WITH A METAL OXIDE OF A METAL CAPABLE OF FROMING INSOLUBLE TERTIARY AND SECONDARY PHOSPHATES IN AN AMOUNT AT LEAST SUFFICIENT TO CONVERT ALL PHOSPHATE PRESENT TO TERTIARY PHOSPHATE, TOGETHER WITH AN INORGANIC MINERAL FILLER, FROM 1/3 TO 2/3 OF THE TOTAL PHOSPHORIC ACID CONTENT BEING PRESENT IN SAID SOLUTION IN THE FORM OF THE SECOND MENTIONED PRIMARY PHOSPHATE, AND FROM 2/3 TO 1/2 OF THE TOTAL PHOSPHORIC ACID CONTENT OF THE SOLUTION BEING PRESENT IN THE FORM OF PRIMARY ALKALL META PHOSPHATE.
Claim 2
Dependent Claim
122 words
IN A PROCESS FOR FORMING A REFRACTORY MOLD, THE STEPS COMPRISING PREPARING A SOLUTION OF A PRIMARY ALKALI METAL PHOSPHATE AND A PRIMARY PHOSPHATE OF A METAL CAPABLE OF FORMING INSOLUBLE SECONDARY AND TERTIARY PHOSPHATES, AND MIXING SAID SOLUTION WITH A METAL OXIDE OF A METAL CAPABLE OF FROMING INSOLUBLE TERTIARY AND SECONDARY PHOSPHATES IN AN AMOUNT AT LEAST SUFFICIENT TO CONVERT ALL PHOSPHATE PRESENT TO TERTIARY PHOSPHATE, TOGETHER WITH AN INORGANIC MINERAL FILLER, FROM 1/3 TO 2/3 OF THE TOTAL PHOSPHORIC ACID CONTENT BEING PRESENT IN SAID SOLUTION IN THE FORM OF THE SECOND MENTIONED PRIMARY PHOSPHATE, AND FROM 2/3 TO 1/2 OF THE TOTAL PHOSPHORIC ACID CONTENT OF THE SOLUTION BEING PRESENT IN THE FORM OF PRIMARY ALKALL META PHOSPHATE.
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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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |