US3780995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding attachment for machine processing foamable plastic materials
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1971-11-01
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Granted: 1973-12-25
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Expires: 1991-11-01
Abstract
Abstract AN ATTACHMENT FOR A MOLDING MACHINE, SERVING TO PREPARE AN INJECTABLE MASS INCLUDING A PROPELLANT, HAS A PLASTICIZING SCREW WHICH FEEDS A MASS OF LIQUEFIED PLASTIC MATERIAL TO A NARROW PERIPHERAL GAP BETWEEN A ROTATING MIXING HEAD AND A HOUSING. ONE OR MORE PASSAGES, CONNECTED TO A SOURCE OR PROPELLANT, OPEN GENERALLY RADIALLY INTO THIS GAP TO ADMIX THE PROPELLANT WITH THE PLASTIC MASS IN A REGION IN WHICH THIS MASS FORMS A THIN LAYER MOVING PERPENDICULARLY TO THESE PASSAGES.
Inventors
- 👤 E Burkle
- 👤 F Loebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:19
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29C44/3446; B29C44/3449; B29C48/00; B29C48/25; B29C48/285; B29C48/29; B29C48/30; B29C48/32; B29C48/335; B29C48/336; B29C48/3366; B29C48/03; B29K; B29K2105/00; B29K2105/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |