Patent US2803188A successfully refreshed from Google Patents.
US2803188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of embossed porous coated porous fiberboard
Assignee: Wood Conversion Co
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Filing: 1954-09-28
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Granted: 1957-08-20
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Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Arndt J Duvall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:01
CPC Classifications
B; B27; B27N; B27N7/00; D; D21; D21J; D21J1/00; D21J1/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF EMBOSSING AN AIR-DRY RIGID POROUS CELLULOSIC FIBERBOARD HAVING A POROUS PIGMENTED FIBERHIDING COAT THEREON WHICH COAT PROVIDES ACCESS TO THE PORES OF THE BOARD, WHICH COMPRISES SUBJECTING THE POROUS COATED FACE TO STEAM FOR PENETRATION OF STEAM THROUGH THE COAT TO THE FIBERS UNDER THE COAT, AND SUBJECTING THE STEAM-TREATED FACE TO MECHANICAL EMBOSSING PRESSURE BY APPLICATION OF A HEATED DESIGN-FORMING MEMBER AT A TEMPERATURE ABOVE 212*F., AND THEREAFTER COOLING THE RESULTING EMBOSSED BOARD.
Claim 2
Independent Claim
77 words
THE METHOD OF EMBOSSING AN AIR-DRY RIGID POROUS CELLULOSIC FIBERBOARD HAVING A POROUS PIGMENTED FIBERHIDING COAT THEREON WHICH COAT PROVIDES ACCESS TO THE PORES OF THE BOARD, WHICH COMPRISES SUBJECTING THE POROUS COATED FACE TO STEAM FOR PENETRATION OF STEAM THROUGH THE COAT TO THE FIBERS UNDER THE COAT, AND SUBJECTING THE STEAM-TREATED FACE TO MECHANICAL EMBOSSING PRESSURE BY APPLICATION OF A HEATED DESIGN-FORMING MEMBER AT A TEMPERATURE ABOVE 212*F., AND THEREAFTER COOLING THE RESULTING EMBOSSED BOARD.
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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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |