Patent US2542301A successfully refreshed from Google Patents.
US2542301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of filaments, films, or the like of artificial materials
Assignee: Slack and Parr Ltd
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Filing: 1947-12-02
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Granted: 1951-02-20
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Expires: 1967-12-02
Abstract
No abstract record available.
Inventors
- 👤 Tom F Barrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:04
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04; D01F; D01F2/00; D01F2/24; D01F2/28; D01F2/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
AN APPARATUS FOR MANUFACTURING ARTIFICIAL MATERIALS FROM SOLUTIONS FO CELLULOSE DERIVATIVES COMPRISING A SPINNING CABINET, A SPINNERET IN SAID CABINET, INJECTION MEANS FOR CONSTANTLY CHARGING SAID SPINNING CABINET WITH A NON-DRYING ATMOSPHERE TO PREVENT INITIAL RAPID DRYING OF THE OUTSIDE SURFACE OF THE EXTRUDED PRODUCTS, AND MEANS FOR SETTING UP A RADIO FREQUENCY ELECTROSTATIC FIELD IN SAID CABINET.
References Cited (Backward Citations)
US1906042A
Cited
US2068538A
Cited
US2168027A
Cited
US2185417A
Cited
US2303983A
Cited
US2433842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |