US2717538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for fissuring fibrous materials
Assignee: Armstrong World Industries Inc
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Filing: 1953-01-15
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Granted: 1955-09-13
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Expires: 1973-01-15
Abstract
No abstract record available.
Inventors
- 👤 John D Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:54
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
AN APPARATUS FOR FORMING FISSURES EXTENDING TO A SUBSTANTIAL DEPTH FROM THE SURFACE OF A MINERAL FIBER MAT COMPRISING: A WATER PREVIOUS CONVEYOR FOR THE RECEPTION OF A SLURRY OF MINERAL FIBERS AND THROUGH WHICH WATER MAY PASS TO PARTIALLY DEWATER SAID SLURRY AND FORM A MAT THEREFROM, MEANS FOR PROGRESSING SAID CONVEYOR WHILE PARTIALLY DEWATERING SAID SLURRY, A SUBSTANTIALLY SMOOTH FISSURING ROLL INTERPOSED ALONG THE PATH OF TRAVEL OF SAID CONVEYOR FOR ENGAGEMENT WITH SAID PARTIALLY DEWATERED SLURRY TO COMPRESS THE SAME AS IT MOVES UNDER SAID FISSURING ROLL, AND MEANS FOR ROTATING SAID FISSURING ROLL IN THE DIRECTION OF TRAVEL OF SAID CONVEYOR AT A SLOWER SPEED THAN THE SPEED OF TRAVEL OF SAID CONVEYOR TO FORM FISSURES WHICH EXTEND TO A SUBSTANTIAL DEPTH FROM THE SURFACE OF AND INTO SAID MAT AS IT IS COMPRESSED AND MOVED UNDER SAID FISSURING ROLL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |