Patent US2325324A successfully refreshed from Google Patents.
Patent US2839209A successfully refreshed from Google Patents.
US2839209A
Expired / Lapsed
US
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Ceramic structure and method for making same
Assignee: Individual
•
Filing: 1955-03-01
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Granted: 1958-06-17
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Expires: 1975-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frank P Lester
- 👤 Marianne H Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:43
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26; A; A47; A47G; A47G19/00; A47G19/22; B28B1/002; B28B11/00; B28B11/04; B28B11/042; B28B11/24; B28B11/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CERAMIC STRUCTURE HAVING AT LEAST ONE WALL COMPRISING AT LEAST TWO SPACED OVERLYING LAYERS OF CERAMIC MATERIAL CONSISTING ESSENTIALLY OF 12 PARTS POWDERED GLASS, 91/2 PARTS BEDMINSTER CLAY, 26 PARTS JORDAN CLAY, 71/2 PARTS VICTORIA CLAY, 4 PARTS LAYTON CLAY, 10 PARTS EXETER CLAY, 8 PARTS SYANITE, 10 PARTS ALUMINUM SILICATE, 3 PARTS BARKER TALC, 11 PARTS HUDSON FLINT NO. 103, AND 321/2 LITERS OF WATER CONTAINING 153 CC. SODIUM SILICATE AND 130 GRAMS OF SODIUM CARBONATE FOR EACH 100 POUNDS OF WATER, SAID LAYERS BEING INTEGRALLY FORMED ONE WITH THE OTHER, MEANS SEALING THE SPACE BETWEEN SAID LAYERS AND A LOW DENSITY INSULATING MATERIAL SUBSTANTIALLY FILLING SAID SPACE.
Claim 2
Dependent Claim
110 words
A CERAMIC STRUCTURE HAVING AT LEAST ONE WALL COMPRISING AT LEAST TWO SPACED OVERLYING LAYERS OF CERAMIC MATERIAL CONSISTING ESSENTIALLY OF 12 PARTS POWDERED GLASS, 91/2 PARTS BEDMINSTER CLAY, 26 PARTS JORDAN CLAY, 71/2 PARTS VICTORIA CLAY, 4 PARTS LAYTON CLAY, 10 PARTS EXETER CLAY, 8 PARTS SYANITE, 10 PARTS ALUMINUM SILICATE, 3 PARTS BARKER TALC, 11 PARTS HUDSON FLINT NO. 103, AND 321/2 LITERS OF WATER CONTAINING 153 CC. SODIUM SILICATE AND 130 GRAMS OF SODIUM CARBONATE FOR EACH 100 POUNDS OF WATER, SAID LAYERS BEING INTEGRALLY FORMED ONE WITH THE OTHER, MEANS SEALING THE SPACE BETWEEN SAID LAYERS AND A LOW DENSITY INSULATING MATERIAL SUBSTANTIALLY FILLING SAID SPACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |