US3284227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyzed gypsum wallboard and method of production thereof
Assignee: Fibreboard Paper Products Corp
•
Filing: 1962-12-06
•
Granted: 1966-11-08
•
Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Mark E Gerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:16
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF WALL CONSTRUCTION COMPRISING IMPREGNATING THE SURFACE OF A WALLBOARD BACKING WITH AN AQUEOUS SOLUTION OF A GYPSUM SETTING CATALYTIC AGENT SELECTED FROM THE GROUP CONSISTING OF POTASSIUM SULPHATE AND MIXTURES OF POTASSIUM SULPHATE AND SALUMINA SULPHATE, AND PLASTERING A SINGLE THIN COAT OF GYPSUM PLASTER COMPRISING ABOUT 15 TO 30 PERCENT INERT FILLER, ABOUT 2 TO 10 PERCENT PLASTICIZER CLAY, ABOUT 0.5 TO 2% OF A MIXTURE OF POLYVINYL ACETATE AND POLYVINYL ALCOHOL, AND THE REMAINDER CONSISTING ESSENTIALLY OF GYPSUM, UPON THE CATALYZED SURFACE OF SAID BACKING, AND FINAL-FINISHING THE THIN PLASTER COAT TO FORM A CONTINUOUS PLASTER EXTERIOR SURFACE.
Claim 2
Independent Claim
103 words
A METHOD OF WALL CONSTRUCTION COMPRISING IMPREGNATING THE SURFACE OF A WALLBOARD BACKING WITH AN AQUEOUS SOLUTION OF A GYPSUM SETTING CATALYTIC AGENT SELECTED FROM THE GROUP CONSISTING OF POTASSIUM SULPHATE AND MIXTURES OF POTASSIUM SULPHATE AND SALUMINA SULPHATE, AND PLASTERING A SINGLE THIN COAT OF GYPSUM PLASTER COMPRISING ABOUT 15 TO 30 PERCENT INERT FILLER, ABOUT 2 TO 10 PERCENT PLASTICIZER CLAY, ABOUT 0.5 TO 2% OF A MIXTURE OF POLYVINYL ACETATE AND POLYVINYL ALCOHOL, AND THE REMAINDER CONSISTING ESSENTIALLY OF GYPSUM, UPON THE CATALYZED SURFACE OF SAID BACKING, AND FINAL-FINISHING THE THIN PLASTER COAT TO FORM A CONTINUOUS PLASTER EXTERIOR SURFACE.
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |