US2731889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and machine for producing
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:04
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/527
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE METHOD COMPRISING SEPARATING AND FORMING A STRIP OF SOLID MATERIALS FROM A MIX OF THE ORDER OF LIQUID HAVING CEMENT AND FIBERS IN SUSPENSION, MOVING SAID STRIP WHILE THE STRIP IS WET THROUGH A PRESSURE CHAMBER WITH ONE SIDE EXPOSED TO THE ATMOSPHERE AND THE OTHER SIDE SUBJECTED TO A GAS PRESSURE SUBSTANTIALLY ABOVE ATMOSPHERIC PRESSURES TO FORCE LIQUID FROM SAID STRIP AND FORM PORES IN SAID STRIP, AND SPREADING A LAYER OF A WET MIX OF A SURFACING SUBSTANCE ON THE SECOND-MENTIONED SIDE OF SAID STRIP WHILE THE STRIP WITH SAID LAYER OF SURFACING SUBSTANCE THEREON IS MOVING THROUGH SAID PRESSURE CHAMBER THEREBY CAUSING SAID SURFACING SUBSTANCES TO FLOW INTO SAID PORES.
Claim 2
Independent Claim
114 words
THE METHOD COMPRISING SEPARATING AND FORMING A STRIP OF SOLID MATERIALS FROM A MIX OF THE ORDER OF LIQUID HAVING CEMENT AND FIBERS IN SUSPENSION, MOVING SAID STRIP WHILE THE STRIP IS WET THROUGH A PRESSURE CHAMBER WITH ONE SIDE EXPOSED TO THE ATMOSPHERE AND THE OTHER SIDE SUBJECTED TO A GAS PRESSURE SUBSTANTIALLY ABOVE ATMOSPHERIC PRESSURES TO FORCE LIQUID FROM SAID STRIP AND FORM PORES IN SAID STRIP, AND SPREADING A LAYER OF A WET MIX OF A SURFACING SUBSTANCE ON THE SECOND-MENTIONED SIDE OF SAID STRIP WHILE THE STRIP WITH SAID LAYER OF SURFACING SUBSTANCE THEREON IS MOVING THROUGH SAID PRESSURE CHAMBER THEREBY CAUSING SAID SURFACING SUBSTANCES TO FLOW INTO SAID PORES.
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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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |