Patent US2990604A successfully refreshed from Google Patents.
US2990604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of thermally treating and lubricating polyethylene terephthalate filaments and yarns
Assignee: Imperial Chemical Industries Ltd
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Filing: 1957-07-08
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Granted: 1961-07-04
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Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Maccormack Kenneth Earnshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:17
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/53; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D06M7/00; C; C10; C10M; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/46; D06M2200/00; D06M2200/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR THERMALLY TREATING AND LUBRICATING POLYETHYLENE TEREPHTHALATE FILAMENTS AND YARNS WHEN MAKING SLIDING CONTACT WITH STATIONARY METAL SURFACES HEATED TO ABOVE 140*C., WHICH COMPRISES APPLYING TO SAID FILAMENTS AN AQUEOUS LUBRICATING COMPOSITION WHICH IS A SOLUTION AND WHICH CONSISTS ESSENTIALLY OF 2-20% BY WEIGHT OF A POLYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 200 AND 600 AND WHICH BY ITSELF IS A LIQUID AT ROOM TEMPERATURE, AND UP TO 10% BY WEIGHT OF AN ANTISTATIC AGENT, SO THAT THE AMOUNT OF THE NON-AQUEOUS COMPONENT OF SAID SOLUTION ON THE FILAMENTS IS AT LEAST 0.2% BY WEIGHT OF THE FILAMENTS, AND THEREAFTER SLIDABLY CONTACTING THE FILAMENTS WITH SAID METAL SURFACE AT A TEMPERATURE ABOVE 140*C.
Claim 2
Dependent Claim
117 words
A PROCESS FOR THERMALLY TREATING AND LUBRICATING POLYETHYLENE TEREPHTHALATE FILAMENTS AND YARNS WHEN MAKING SLIDING CONTACT WITH STATIONARY METAL SURFACES HEATED TO ABOVE 140*C., WHICH COMPRISES APPLYING TO SAID FILAMENTS AN AQUEOUS LUBRICATING COMPOSITION WHICH IS A SOLUTION AND WHICH CONSISTS ESSENTIALLY OF 2-20% BY WEIGHT OF A POLYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 200 AND 600 AND WHICH BY ITSELF IS A LIQUID AT ROOM TEMPERATURE, AND UP TO 10% BY WEIGHT OF AN ANTISTATIC AGENT, SO THAT THE AMOUNT OF THE NON-AQUEOUS COMPONENT OF SAID SOLUTION ON THE FILAMENTS IS AT LEAST 0.2% BY WEIGHT OF THE FILAMENTS, AND THEREAFTER SLIDABLY CONTACTING THE FILAMENTS WITH SAID METAL SURFACE AT A TEMPERATURE ABOVE 140*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |