Patent US4124365A successfully refreshed from Google Patents.
US4124365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making continuous foam glass product
Assignee: Individual
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Filing: 1977-05-05
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Granted: 1978-11-07
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Expires: 1997-05-05
Abstract
Abstract A continuous process for the manufacture of cellular ceramic product. Ceramic feed material is transported successively through a preheat kiln section, through a foaming section whereat foaming agent mixed with the ceramic feed material is activated, and into a drawing kiln section. An elongate hollow product can be formed by drawing the foamed ceramic while soft around and past a hollow mandrel to form an elongate hollow cylindrical member.
Inventors
- 👤 Tudor Williams
- 👤 John D. Bost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007; C03B; C03B15/00; C03B15/14; C03B19/00; C03B19/08; C04; C04B; C04B38/00; C04B38/02; Y; Y10; Y10S; Y10S425/00; Y10S425/108
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A moldless process for the manufacture of cellular ceramic product in which a foaming agent is added to a ceramic feed, said foaming agent requiring a temperature in excess of 500° C. for activation, comprising: heating said ceramic feed to a temperature of at least 500° C. but which is lower than said activation temperature; thereafter, adding foaming agent to said heated ceramic feed to form a mixture thereof; heating said mixture of foaming agent and heated ceramic feed to said activation temperature for a time sufficient to form foamed ceramic therefrom; and drawing said foamed ceramic to form said product.
Claim 2
Dependent Claim
101 words
A moldless process for the manufacture of cellular ceramic product in which a foaming agent is added to a ceramic feed, said foaming agent requiring a temperature in excess of 500° C. for activation, comprising: heating said ceramic feed to a temperature of at least 500° C. but which is lower than said activation temperature; thereafter, adding foaming agent to said heated ceramic feed to form a mixture thereof; heating said mixture of foaming agent and heated ceramic feed to said activation temperature for a time sufficient to form foamed ceramic therefrom; and drawing said foamed ceramic to form said product.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein said first temperature is in the range of about 500° C. to 750° C. and said activation temperature is in the range of about 800° C. to 1200° C.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said ceramic feed comprises a major amount by weight of fly ash.
Claim 5
Dependent Claim
31 words
The process of claim 3 in which said product is formed by drawing said foamed ceramic while soft, around and past a hollow mandrel while air is passed through said mandrel.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |