Patent US2549516A successfully refreshed from Google Patents.
US2549516A
Expired / Lapsed
US
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Structural unit and method of manufacture
Assignee: Johns Manville Corp
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Filing: 1946-04-06
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Granted: 1951-04-17
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Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:57
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/246; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A METHOD OF IMPARTING A DECORATIVE, SMOOTH AND WATERPROOF SURFACE TO A HYDRATED AND HARDENED HYDRAULIC CEMENT SURFACE WHICH COMPRISES, APPLYING THERETO A THIN COLOR SUB-COAT OF NOT TO EXCEED .0025 INCH THICKNESS BY DRYING AND HEAT CURING IN SITU A FILM SUSPENSION OF FINELY DIVIDED CLAY AND A MINERAL PIGMENT IN AN AQUEOUS SODIUM SILICATE SOLUTION OF HIGH SILICA CONTENT, AND APPLYING OVER THE SUB-COAT A THIN TRANSPARENT FINISH COAT BY DRYING AND HEAT HARDENING A SOLVENT REDUCED FILM OF PLASTICIZED VINYL-CHLORIDE-VINYL-ACETATE COPOLYMER RESIN.
References Cited (Backward Citations)
US2128961A
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GB473513A
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US2307629A
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US2347684A
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US2354351A
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US2372284A
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US2350030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |