US3515624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural material of expanded minerals and method for manufacture
Assignee: Central Manufacturing District
•
Filing: 1964-07-08
•
Granted: 1970-06-02
•
Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Anthony L Garnero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:01
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0038; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249973; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
45 words
A COMPOSITE, POROUS, THERMAL INSULATION PANEL CHARACTERIZED BY DIMENSIONAL STABILITY AND STRUCTURAL STRENGTH CONSISTING ESSENTIALLY OF EXPANDED PERLITE PARTICLES WHICH ARE INTERBONDED ONE TO ANOTHER BY INTERFUSION BETWEEN THE SURFACES OF THE PERLITE PARTICLES WHILE IN A PYROPYLASTIC STATE TO FORM A POROUS PERLITE PANEL.
Claim 2
Dependent Claim
45 words
A COMPOSITE, POROUS, THERMAL INSULATION PANEL CHARACTERIZED BY DIMENSIONAL STABILITY AND STRUCTURAL STRENGTH CONSISTING ESSENTIALLY OF EXPANDED PERLITE PARTICLES WHICH ARE INTERBONDED ONE TO ANOTHER BY INTERFUSION BETWEEN THE SURFACES OF THE PERLITE PARTICLES WHILE IN A PYROPYLASTIC STATE TO FORM A POROUS PERLITE PANEL.
Claim 3
Dependent Claim
21 words
AN INSULATION PANEL AS CLAIMED IN CLAIM 1 IN WHICH THE PANEL IS FORMED IN CROSS-SECTION WITH LAYERS OF DIFFERENT DENSITIES.
References Cited (Backward Citations)
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US2550877A
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US2691248A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |