Patent US2725596A successfully refreshed from Google Patents.
US2725596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder
Assignee: Celanese Corp
•
Filing: 1953-01-29
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Granted: 1955-12-06
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Weber Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:30
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/36; B29C48/395; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92314; B29C2948/92504; B29C2948/92514; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/904; Y10S100/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN AN EXTRUDER FOR THERMOPLASTIC MATERIAL, A CHAMBER, A HEATED JACKET COMMUNICATING THEREWITH, A ROTATABLE SCREW FOR CONVEYING THERMOPLASTIC MATERIAL THROUGH SAID JACKET AND TO SAID CHAMBER UNDER PRESSURE, AND MEANS FOR IMPROVING THE UNIFORMITY OF THE PRESSURE OF THE THERMOPLASTIC MATERIAL WITHIN SAID CHAMBER COMMPRISING MEANS SUPPORTED BY SAID SCREW AND RELATIVELY MOVABLE WITH RESPECT THERETO AND EXTENDING INTO SAID CHAMBER THAT RESPONDS TO AN INCREASE IN PRESSURE IN SAID CHAMBER BY MOVING OUT OF THE CHAMBER TO INCREASE THE EFFECTIVE VOLUME OF THE CHAMBER AND THEREBY REDUCE THE PRESSURE THEREIN, AND THAT RESPONDS TO A DECREASE IN PRESSURE IN SAID CHAMBER BY MOVING INTO THE CHAMBER TO REDUCE THE EFFECTIVE VOLUME OF THE CHAMBER AND THEREBY INCREASE THE PRESSURE THEREIN.
Claim 2
Dependent Claim
122 words
IN AN EXTRUDER FOR THERMOPLASTIC MATERIAL, A CHAMBER, A HEATED JACKET COMMUNICATING THEREWITH, A ROTATABLE SCREW FOR CONVEYING THERMOPLASTIC MATERIAL THROUGH SAID JACKET AND TO SAID CHAMBER UNDER PRESSURE, AND MEANS FOR IMPROVING THE UNIFORMITY OF THE PRESSURE OF THE THERMOPLASTIC MATERIAL WITHIN SAID CHAMBER COMMPRISING MEANS SUPPORTED BY SAID SCREW AND RELATIVELY MOVABLE WITH RESPECT THERETO AND EXTENDING INTO SAID CHAMBER THAT RESPONDS TO AN INCREASE IN PRESSURE IN SAID CHAMBER BY MOVING OUT OF THE CHAMBER TO INCREASE THE EFFECTIVE VOLUME OF THE CHAMBER AND THEREBY REDUCE THE PRESSURE THEREIN, AND THAT RESPONDS TO A DECREASE IN PRESSURE IN SAID CHAMBER BY MOVING INTO THE CHAMBER TO REDUCE THE EFFECTIVE VOLUME OF THE CHAMBER AND THEREBY INCREASE THE PRESSURE THEREIN.
References Cited (Backward Citations)
US2295942A
Cited
US2471813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |