Patent US2886484A successfully refreshed from Google Patents.
US2886484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Normal cured dry pressed products
Assignee: Johns Manville Corp
•
Filing: 1954-05-25
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Granted: 1959-05-12
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Expires: 1974-05-25
Abstract
No abstract record available.
Inventors
- 👤 Clayton V French
- 👤 Elmer R Ihne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; B; B28; B28B; B28B1/00; B28B1/52; B28B1/526
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF MANUFACTURING A DRY PROCESS NORMAL CURED FIBER-CEMENT SHEET FROM AN INTIMATE MIXTURE FORMED AS A LAYER FROM AN AIR SUSPENSION UPON A FELTING MEMBER TO FORM A WEB, SAID WEB COMPRISING CEMENT PARTICLES, STAPLE REINFORCING FIBER, AND WATER IN AMOUNT APPROXIMATELY 14 TO 25% BY WEIGHT OF THE UNCURED DENSIFIED WEB, COMPRISING THE STEPS OF COMPRESSING SAID WEB EMPLOYING A CONSOLIDATING ROLLER EXERTING A PRESSURE OF APPROXIMATELY 200 TO 2600 LBS. PER TRANSVERSE LINEAL INCH, WHILE PRESERVING THE RELATION BETWEEN SAID WATER CONTENT AND SAID PRESSURE WITHIN THE APPROXIMATE LIMITS INDICATED BY THE SOLID LINES IN THE ACCOMPANYING FIGURE 4, AND THEN AIR CURING SAID COMPRESSED AND DENSIFIED WEB TO HARADEN THE CEMENT THEREIN.
Claim 2
Independent Claim
117 words
THE METHOD OF MANUFACTURING A DRY PROCESS NORMAL CURED FIBER-CEMENT SHEET FROM AN INTIMATE MIXTURE FORMED AS A LAYER FROM AN AIR SUSPENSION UPON A FELTING MEMBER TO FORM A WEB, SAID WEB COMPRISING CEMENT PARTICLES, STAPLE REINFORCING FIBER, AND WATER IN AMOUNT APPROXIMATELY 14 TO 25% BY WEIGHT OF THE UNCURED DENSIFIED WEB, COMPRISING THE STEPS OF COMPRESSING SAID WEB EMPLOYING A CONSOLIDATING ROLLER EXERTING A PRESSURE OF APPROXIMATELY 200 TO 2600 LBS. PER TRANSVERSE LINEAL INCH, WHILE PRESERVING THE RELATION BETWEEN SAID WATER CONTENT AND SAID PRESSURE WITHIN THE APPROXIMATE LIMITS INDICATED BY THE SOLID LINES IN THE ACCOMPANYING FIGURE 4, AND THEN AIR CURING SAID COMPRESSED AND DENSIFIED WEB TO HARADEN THE CEMENT THEREIN.
References Cited (Backward Citations)
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Cited
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US2445210A
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |