Patent US2520169A successfully refreshed from Google Patents.
US2520169A
Expired / Lapsed
US
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Method and apparatus for fiberizing molten material
Assignee: Johns Manville Corp
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Filing: 1948-09-29
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Granted: 1950-08-29
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 Edward R Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; C; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/05; C03B37/055; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN AN APPARATUS FOR CONVERTING A MOLTEN RAW MATERIAL TO FIBERS HAVING MEANS FOR DISCHARGING A FLUID STREAM OF THE MOLTEN MATERIAL, THE IMPROVEMENT COMPRISING MEANS IN THE PATH OF THE STREAM FOR SPREADING THE STREAM LATERALLY, SAID STREAM SPREADING MEANS INCLUDING A ROTOR HAVING A CONED PERIPHERAL SURFACE, A SHAFT SUPPORTING SAID ROTOR FOR ROTATION WITH SAID SURFACE IN THE PATH OF THE STREAM, A SECOND ROTOR HAVING AN OPPOSITELY CONED PERIPHERAL SURFACE, A SHAFT SUPPORTING SAID SECOND ROTOR FOR ROTATION WITH ITS SURFACE ADJACENT THE FIRST ROTOR, SAID SHAFTS EXTENDING AT AN ACUTE ANGLE TO EACH OTHER; A THIRD ROTOR HAVING A PERIPHERAL SURFACE, MEANS MOUNTING SAID ROTOR FOR ROTATION WITH ITS PERIPHERAL SURFACE IN THE PATH OF THE SPREAD STREAM, A FOURTH ROTOR HAVING A PERIPHERAL SURFACE IN THE PATH OF THE MATERIAL DISCHARGED BY SAID THIRD ROTOR, AND MEANS FOR ROTATING SAID ROTORS.
Claim 2
Dependent Claim
147 words
IN AN APPARATUS FOR CONVERTING A MOLTEN RAW MATERIAL TO FIBERS HAVING MEANS FOR DISCHARGING A FLUID STREAM OF THE MOLTEN MATERIAL, THE IMPROVEMENT COMPRISING MEANS IN THE PATH OF THE STREAM FOR SPREADING THE STREAM LATERALLY, SAID STREAM SPREADING MEANS INCLUDING A ROTOR HAVING A CONED PERIPHERAL SURFACE, A SHAFT SUPPORTING SAID ROTOR FOR ROTATION WITH SAID SURFACE IN THE PATH OF THE STREAM, A SECOND ROTOR HAVING AN OPPOSITELY CONED PERIPHERAL SURFACE, A SHAFT SUPPORTING SAID SECOND ROTOR FOR ROTATION WITH ITS SURFACE ADJACENT THE FIRST ROTOR, SAID SHAFTS EXTENDING AT AN ACUTE ANGLE TO EACH OTHER; A THIRD ROTOR HAVING A PERIPHERAL SURFACE, MEANS MOUNTING SAID ROTOR FOR ROTATION WITH ITS PERIPHERAL SURFACE IN THE PATH OF THE SPREAD STREAM, A FOURTH ROTOR HAVING A PERIPHERAL SURFACE IN THE PATH OF THE MATERIAL DISCHARGED BY SAID THIRD ROTOR, AND MEANS FOR ROTATING SAID ROTORS.
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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |