US2571319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of colored filaments and fibers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1949-11-25
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Granted: 1951-10-16
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Waters Edmund
- 👤 Wood Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F1/00; D01F1/02; D01F1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PRODUCTION OF COLOURED FILAMENTS AND FIBERS FROM POLYETHYLENE TEREPHTHALATE WHICH COMPRISES DISSOLVING ORGANIC COLOURING MATTER IN POLYETHYLENE TEREPHTHALATE AND THEREAFTER SPINNING THE POLYETHYLENE TEREPHTHALATE, SAID ORGANIC COLOURING MATTER BEING STABLE AT THE SPINNING TEMPERATURE.
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PRODUCTION OF COLOURED FILAMENTS AND FIBERS FROM POLYETHYLENE TEREPHTHALATE WHICH COMPRISES DISSOLVING ORGANIC COLOURING MATTER IN POLYETHYLENE TEREPHTHALATE AND THEREAFTER SPINNING THE POLYETHYLENE TEREPHTHALATE, SAID ORGANIC COLOURING MATTER BEING STABLE AT THE SPINNING TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |