Patent US2996632A successfully refreshed from Google Patents.
Patent US3138368A successfully refreshed from Google Patents.
US3138368A
Expired / Lapsed
US
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Forming castings
Assignee: PPG Industries Inc
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Filing: 1961-06-15
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Granted: 1964-06-23
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Expires: 1981-06-15
Abstract
No abstract record available.
Inventors
- 👤 Robert E Park
- 👤 Carl P Izzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:06
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; B; B01; B01F; B01F29/00; B01F29/40; B01F29/403; B01F29/4034; B01F29/60; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF AGITATING A LIQUID WHICH IS POLYMERIZABLE TO A SOLID, RESINOUS STATE AND OF A VISCOSITY BETWEEN ABOUT 400 AND ABOUT 60,000 CENTIPOISES, AND AN ADDED MATERIAL TO FORM A LIQUID MIXTURE WITHOUT ENTRAPPING GAS THEREIN FROM AN ATMOSPHERE CONTACTING THE LIQUID, WHICH COMPRISES DISPOSING THE LIQUID AND THE ADDED MATERIAL IN A CONTAINER OF SUBSTANTIALLY CIRCULAR SECTION, PARTIALLY TO FILL THE SAME, AND ROTATING THE CONTAINER ABOUT ITS CENTRAL AXIS, SAID AXIS BEING IN NONVERTICAL POSITION, THE RATE OF ROTATION ALLOWING A POOL OF SAID LIQUID TO REMAIN IN THE LOWER PORTION OF THE CONTAINER, BUT FURTHER ALLOWING SOME OF THE LIQUID TO BE DRAWN UP BY THE WALLS OF THE CONTAINER AND QUIESCENTLY TO DRAIN BACK DOWN OVER THE SURFACE OF THE LIQUID BEING DRAWN UP, AND TO RETURN TO THE POOL WITHOUT ARCHING OVER AND FALLING BACK INTO THE POOL, CONTINUING TO ROTATE THE CONTAINER UNTIL THE ADDED MATERIAL HAS BEEN UNIFORMLY INCORPORATED AND THEN POURING THE FLOWABLE LIQUID, SUBSTANTIALLY BUBBLE-FREE MIXTURE FROM THE CONTAINER AS A COHERENT, LIQUID BODY.
Claim 2
Independent Claim
175 words
THE METHOD OF AGITATING A LIQUID WHICH IS POLYMERIZABLE TO A SOLID, RESINOUS STATE AND OF A VISCOSITY BETWEEN ABOUT 400 AND ABOUT 60,000 CENTIPOISES, AND AN ADDED MATERIAL TO FORM A LIQUID MIXTURE WITHOUT ENTRAPPING GAS THEREIN FROM AN ATMOSPHERE CONTACTING THE LIQUID, WHICH COMPRISES DISPOSING THE LIQUID AND THE ADDED MATERIAL IN A CONTAINER OF SUBSTANTIALLY CIRCULAR SECTION, PARTIALLY TO FILL THE SAME, AND ROTATING THE CONTAINER ABOUT ITS CENTRAL AXIS, SAID AXIS BEING IN NONVERTICAL POSITION, THE RATE OF ROTATION ALLOWING A POOL OF SAID LIQUID TO REMAIN IN THE LOWER PORTION OF THE CONTAINER, BUT FURTHER ALLOWING SOME OF THE LIQUID TO BE DRAWN UP BY THE WALLS OF THE CONTAINER AND QUIESCENTLY TO DRAIN BACK DOWN OVER THE SURFACE OF THE LIQUID BEING DRAWN UP, AND TO RETURN TO THE POOL WITHOUT ARCHING OVER AND FALLING BACK INTO THE POOL, CONTINUING TO ROTATE THE CONTAINER UNTIL THE ADDED MATERIAL HAS BEEN UNIFORMLY INCORPORATED AND THEN POURING THE FLOWABLE LIQUID, SUBSTANTIALLY BUBBLE-FREE MIXTURE FROM THE CONTAINER AS A COHERENT, LIQUID BODY.
References Cited (Backward Citations)
US159899A
Cited
US2510858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |