US3271492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a non-porous board composed of strands of wood and portland cement
Assignee: Elmendorf Research Inc
•
Filing: 1965-02-01
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Granted: 1966-09-06
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Elmendorf Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:55
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/525; Y; Y10; Y10S; Y10S425/00; Y10S425/20; Y10S425/201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN THE PROCESS OF MAKING A NON-POROUS BUILDING BOARD COMPOSED OF WOOD SHAVINGS AND PORTLAND CEMENT HAVING A DENISTY OF 0.9 TO 1.4 IN WHICH THE RATIO OF THE WEIGHT OF THE CEMENT TO THE WEIGHT OF THE WOOD SHAVINGS IS MORE THAN 1.5 BUT LESS THAN 5, THE STEPS OF MIXING WATER, SHAVINGS AND CEMENT UNTIL ALL THE CEMENT ADHERES TO THE SHAVINGS; MOVING A MASS OF SAID COATED SHAVINGS TOWARD A SEPARATING STATION; REMOVING INDIVIDUAL COATED SHAVINGS FROM THE ADVANCING MASS, THROWING THE COATED SHAVINGS THROUGH THE AIR SO THEY FREELY ONTO A MOVING SUPPORT WITHOUT LOSS OF CEMENT, FORMING A CONTINOUS LAYER OF LOOSELY FELTED COATED SHAVINGS, AND PRESSING SAID LAYER OF LOOSELY FELTED COATED SHAVINGS.
Claim 2
Dependent Claim
119 words
IN THE PROCESS OF MAKING A NON-POROUS BUILDING BOARD COMPOSED OF WOOD SHAVINGS AND PORTLAND CEMENT HAVING A DENISTY OF 0.9 TO 1.4 IN WHICH THE RATIO OF THE WEIGHT OF THE CEMENT TO THE WEIGHT OF THE WOOD SHAVINGS IS MORE THAN 1.5 BUT LESS THAN 5, THE STEPS OF MIXING WATER, SHAVINGS AND CEMENT UNTIL ALL THE CEMENT ADHERES TO THE SHAVINGS; MOVING A MASS OF SAID COATED SHAVINGS TOWARD A SEPARATING STATION; REMOVING INDIVIDUAL COATED SHAVINGS FROM THE ADVANCING MASS, THROWING THE COATED SHAVINGS THROUGH THE AIR SO THEY FREELY ONTO A MOVING SUPPORT WITHOUT LOSS OF CEMENT, FORMING A CONTINOUS LAYER OF LOOSELY FELTED COATED SHAVINGS, AND PRESSING SAID LAYER OF LOOSELY FELTED COATED SHAVINGS.
References Cited (Backward Citations)
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |