Patent US1482547A successfully refreshed from Google Patents.
Patent US3017305A successfully refreshed from Google Patents.
US3017305A
Expired / Lapsed
US
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Building board
Assignee: Kaiser Gypsum Co Inc
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Filing: 1956-08-23
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Granted: 1962-01-16
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 Manvel C Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
PROCESS FOR MAKING A GYPSUM CORE BOARD HAVING INCREASED EDGE STRENGTH AND HARDNESS AND HAVING AN UPPER AND A LOWER PAPER LINER WHICH COMPRISES FIRST IMPREGNATING THE INNER SURFACE OF SAID LOWER LINER IN A STRIP EXTENDING FROM ONE INCH TO TWELVE INCHES INWARDLY FROM EACH EDGE OF SAID LINER WITH A WATER SOLUTION CONTAINING 15 POUNDS OF SUCROSE AND 20 POUNDS OF GLYCEROL AND 65 POUNDS OF WATER IN AN AMOUNT TO PROVIDE FROM TWO TO SIXTEEN OUNCES OF TOTAL OF BOTH SUBSTANCES PER THOUSAND SQUARE FEET OF BOARD, THEREAFTER DEPOSITING A PLASTIC SLURRY OF CALCINED GYPSUM UPON SAID LOWER LINER, FOLDING THE EDGES OF SAID LINEAR OVER THE EDGES OF SAID GYPSUM SLURRY, PLACING SAID UPPER PAPER LINER UPON SAID SLURRY AND FORMING SAID BOARD AND HEATING TO DRY.
Claim 2
Dependent Claim
131 words
PROCESS FOR MAKING A GYPSUM CORE BOARD HAVING INCREASED EDGE STRENGTH AND HARDNESS AND HAVING AN UPPER AND A LOWER PAPER LINER WHICH COMPRISES FIRST IMPREGNATING THE INNER SURFACE OF SAID LOWER LINER IN A STRIP EXTENDING FROM ONE INCH TO TWELVE INCHES INWARDLY FROM EACH EDGE OF SAID LINER WITH A WATER SOLUTION CONTAINING 15 POUNDS OF SUCROSE AND 20 POUNDS OF GLYCEROL AND 65 POUNDS OF WATER IN AN AMOUNT TO PROVIDE FROM TWO TO SIXTEEN OUNCES OF TOTAL OF BOTH SUBSTANCES PER THOUSAND SQUARE FEET OF BOARD, THEREAFTER DEPOSITING A PLASTIC SLURRY OF CALCINED GYPSUM UPON SAID LOWER LINER, FOLDING THE EDGES OF SAID LINEAR OVER THE EDGES OF SAID GYPSUM SLURRY, PLACING SAID UPPER PAPER LINER UPON SAID SLURRY AND FORMING SAID BOARD AND HEATING TO DRY.
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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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |