US4005954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of plaster floors by the flooding process
Assignee: Bayer AG
•
Filing: 1974-04-10
•
Granted: 1977-02-01
•
Expires: 1994-04-10
Abstract
Abstract In the process for producing a plaster flooring having a flat and smooth surface by the flooding technique, in which an inorganic binder is made up into a fluid paste by the addition of water and said fluid paste is applied to a surface to be covered, the improvement which comprises providing a water-absorbent layer on said surface to be covered prior to application of said fluid paste.
Inventors
- 👤 Friedrich Hinsche
- 👤 Kurt Schaupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:58
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/31504; Y10T428/31971; Y10T428/31993; Y10T428/31996
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
In the process for producing a plaster flooring having a flat and smooth surface by mixing an inorganic binder with water to form a fluid paste and applying said fluid paste to a surface to be covered so that said paste flows freely thereover, the improvements which comprise coating the surface to be covered with a water-absorbent layer prior to application of said fluid paste, said water-absorbent layer comprising at least one material selected from the group consisting of gypsum, natural anhydrite, synthetic anhydrite and cement and being used in 2.5 to 42% by weight of the solids in the fluid paste, said binder being an anhydrite which has a water-binder factor of about 0.38 to 0.75.
Claim 2
Dependent Claim
117 words
In the process for producing a plaster flooring having a flat and smooth surface by mixing an inorganic binder with water to form a fluid paste and applying said fluid paste to a surface to be covered so that said paste flows freely thereover, the improvements which comprise coating the surface to be covered with a water-absorbent layer prior to application of said fluid paste, said water-absorbent layer comprising at least one material selected from the group consisting of gypsum, natural anhydrite, synthetic anhydrite and cement and being used in 2.5 to 42% by weight of the solids in the fluid paste, said binder being an anhydrite which has a water-binder factor of about 0.38 to 0.75.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1, wherein the binder is an anhydrite which has a water-binder factor of about 0.45 to 0.60.
Claim 4
Dependent Claim
30 words
A process as claimed in claim 1, wherein prior to application of said fluid paste the waterabsorbent layer is covered with a separating layer through which the water can diffuse.
Claim 5
Dependent Claim
47 words
A process as claimed in claim 3, wherein the material used to form the separating layer comprises at least one material selected from the group consisting of paper, cardboard, a textile fabric, a perforated plastic sheet and a substance which is dissolved by the action of water.
Claim 6
Dependent Claim
28 words
A process as claimed in claim 3, wherein the water-absorbent layer of a suitable thickness and the appropriate separating layer are used together as a prefabricated combined element.
Claim 7
Dependent Claim
10 words
A plaster flooring produced by the process of claim 1.
Claim 8
Dependent Claim
10 words
A plaster flooring produced by the process of claim 4.
References Cited (Backward Citations)
US2362060A
Cited
US825870A
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US1664638A
Cited
US2307696A
Cited
US3389042A
Cited
US3694298A
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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) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |