Patent US2990292A successfully refreshed from Google Patents.
US2990292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film technique fabrication improvement for slip casting powdered materials
Assignee: Individual
•
Filing: 1958-05-28
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Granted: 1961-06-27
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Expires: 1978-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul E Rempes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:02
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
THE METHOD OF PROVIDING A WATER PERVIOUS AND PARTICLE IMPERVIOUS FILM AND AN IMPROVED FILM RELEASE FOR SLIP CAST MATERIALS FROM POROUS MOLDS CONSISTING OF COATING THE MOLD SURFACE WITH A WATER SOLUTION OF AN ALGINATE SELECTED FROM THE GROUP CONSISTING OF SODIUM ALGINATE, POTASSIUM ALGINATE, AMMONIUM ALGINATE AND PROPYLENE GLYCOL ALGINATE, AND DRYING THE COATING TO FORM A THIN WATER PERMEABLE FILM PRIOR TO CASTING THE SLIP IN THE MOLD.
References Cited (Backward Citations)
US2273015A
Cited
US2333679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |