Patent US3353918A successfully refreshed from Google Patents.
US3353918A
Expired / Lapsed
US
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Apparatus for manufacturing mouldable urethane foams
Assignee: Individual
•
Filing: 1963-10-24
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Granted: 1967-11-21
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Perrin Alan Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:20
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/45; B01F25/451; B01F25/4512; Y; Y10; Y10S; Y10S261/00; Y10S261/26; Y10S366/00; Y10S366/604; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN APPARATUS FOR MIXING MATERIAL, FOR EXAMPLE, INGREDIENTS FOR THE MANUFACTURE OF URETHANE FOAM, COMPRISING: A MIXTING DEVICE CONTAINING TWO CHAMBERS HAVING ADJACENT ENDS INTERCONNECTED WITH ONE ANOTHER BY WALL MEANS DEFINING A PLURALITY OF OPENINGS THROUGH SAID ADJACENT ENDS AND TWO PISTONS EACH SLIDABLY MOUNTED IN A RESPECTIVE ONE OF THE CHAMBERS; MEANS FOR OSCILLATING THE PISTONS WITHIN THE CHAMBERS TO FORCE INGREDIENTS IN THE MIXING DEVICE BACK AND FORTH THROUGH THE OPENINGS TO EFFECT MIXING OF THE INGREDIENTS, SAID WALL MEANS DEFINING A DISCHARGE PASSAGE HAVING A CONTROL VALVE INTERPOSED THEREIN WITH WHICH PASSAGE THE OPENINGS COMMUNICATE WHEREBY THE MIXED INGREDIENTS MAY BE DISCHARGED BY CONVERGENCE OF THE PISTONS WITH THE WALL WITH THE VALVE OPEN; THE WALL ALSO INCLUDING MEANS DEFINING AN INLET PASSAGE COMMUNICATING WITH THE OPENINGS FOR CHARGING THE MIXING DEVICE.
Claim 2
Independent Claim
136 words
AN APPARATUS FOR MIXING MATERIAL, FOR EXAMPLE, INGREDIENTS FOR THE MANUFACTURE OF URETHANE FOAM, COMPRISING: A MIXTING DEVICE CONTAINING TWO CHAMBERS HAVING ADJACENT ENDS INTERCONNECTED WITH ONE ANOTHER BY WALL MEANS DEFINING A PLURALITY OF OPENINGS THROUGH SAID ADJACENT ENDS AND TWO PISTONS EACH SLIDABLY MOUNTED IN A RESPECTIVE ONE OF THE CHAMBERS; MEANS FOR OSCILLATING THE PISTONS WITHIN THE CHAMBERS TO FORCE INGREDIENTS IN THE MIXING DEVICE BACK AND FORTH THROUGH THE OPENINGS TO EFFECT MIXING OF THE INGREDIENTS, SAID WALL MEANS DEFINING A DISCHARGE PASSAGE HAVING A CONTROL VALVE INTERPOSED THEREIN WITH WHICH PASSAGE THE OPENINGS COMMUNICATE WHEREBY THE MIXED INGREDIENTS MAY BE DISCHARGED BY CONVERGENCE OF THE PISTONS WITH THE WALL WITH THE VALVE OPEN; THE WALL ALSO INCLUDING MEANS DEFINING AN INLET PASSAGE COMMUNICATING WITH THE OPENINGS FOR CHARGING THE MIXING DEVICE.
References Cited (Backward Citations)
US2312639A
Cited
US2764565A
Cited
US2813300A
Cited
US3031271A
Cited
US3012977A
Cited
US3063813A
Cited
US2948920A
Cited
US3111389A
Cited
US3140078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |