Patent US3136683A successfully refreshed from Google Patents.
US3136683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ceramic acoustical product having improved fired strength
Assignee: Armstrong World Industries Inc
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Filing: 1961-10-31
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Granted: 1964-06-09
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Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 John A Denlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:17
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/02; C04B33/00; C04B33/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A METHOD OF PRODUCING A CERAMIC ACOUSTICAL BOARD PRODUCT WHEREIN A BOARD MAKING SLURRY CONSISTING ESSENTIALLY OF WATER, MINERAL WOOL, AND MISSISISIPPI M&D CLAY IS FORMED INTO A BOARD ON A BOARD FORMING SCREEN, DRIED AND FIRED AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 1000-15000*F. TO FORM A CERAMIC BOND, THE IMPROVEMENT WHICH COMPRISES ADDING FROM ABOUT 0.5% TO ABOUT 9% BY WEIGHT OF SODIUM BICARBONATE, BASED ON THE WEIGHT OF THE SLURRY SOLIDS, TO SAID BOARD MAKING SLURRY.
Claim 2
Dependent Claim
82 words
IN A METHOD OF PRODUCING A CERAMIC ACOUSTICAL BOARD PRODUCT WHEREIN A BOARD MAKING SLURRY CONSISTING ESSENTIALLY OF WATER, MINERAL WOOL, AND MISSISISIPPI M&D CLAY IS FORMED INTO A BOARD ON A BOARD FORMING SCREEN, DRIED AND FIRED AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 1000-15000*F. TO FORM A CERAMIC BOND, THE IMPROVEMENT WHICH COMPRISES ADDING FROM ABOUT 0.5% TO ABOUT 9% BY WEIGHT OF SODIUM BICARBONATE, BASED ON THE WEIGHT OF THE SLURRY SOLIDS, TO SAID BOARD MAKING SLURRY.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |