Patent US3014011A successfully refreshed from Google Patents.
US3014011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying polyester chips
Assignee: Onderzoekings Instituut Research
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Filing: 1958-02-03
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Granted: 1961-12-19
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Zoetbrood Gijsbertus Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08G; C08G63/00; C08G63/88; C08G63/90; C08J3/124; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF DRYING AMORPHOUS POLYETHYLENE TEREPHTHALATE GRANULES WHICH COMPRISES TREATING THE AMORPHOUS POLYETHYLENE TEREPTHALATE GRANULES FOR FROM 5 TO 60 MINUTES AT A TEMPERATURE FROM ROOM TEMPERATURE TO ABOUT 110*C. WITH A SWELLING AGENT FOR THE POLYETHYLENE TEREPHTHALATE, SELECTED FROM THE GROUP CONSISTING OF WATER, SATURATED STEAM, TOLUENE, BENZENE, NITROMETHANE AND ACETONE, TO EFFECT AT LEAST A PARTIAL CRYSTALLIZATION OF THE GRANULES AND AN INCREASE OF THE SPECIFIC GRAVITY OF THE GRANULES TO AT LEAST 1.34, WHEREBY STICKING TOGETHER OF THE GRANULES DURING SUBSEQUENT DRYING IS INHIBITED AND FINALLY DRYING THE GRANULES AT A TEMPERATURE OF ABOUT 160*C. TO 170*C. AND, DURING SAID DRYING, HOLDING MOVEMENT OF THE GRANULES TO A MINIMUM.
Claim 2
Independent Claim
113 words
A METHOD OF DRYING AMORPHOUS POLYETHYLENE TEREPHTHALATE GRANULES WHICH COMPRISES TREATING THE AMORPHOUS POLYETHYLENE TEREPTHALATE GRANULES FOR FROM 5 TO 60 MINUTES AT A TEMPERATURE FROM ROOM TEMPERATURE TO ABOUT 110*C. WITH A SWELLING AGENT FOR THE POLYETHYLENE TEREPHTHALATE, SELECTED FROM THE GROUP CONSISTING OF WATER, SATURATED STEAM, TOLUENE, BENZENE, NITROMETHANE AND ACETONE, TO EFFECT AT LEAST A PARTIAL CRYSTALLIZATION OF THE GRANULES AND AN INCREASE OF THE SPECIFIC GRAVITY OF THE GRANULES TO AT LEAST 1.34, WHEREBY STICKING TOGETHER OF THE GRANULES DURING SUBSEQUENT DRYING IS INHIBITED AND FINALLY DRYING THE GRANULES AT A TEMPERATURE OF ABOUT 160*C. TO 170*C. AND, DURING SAID DRYING, HOLDING MOVEMENT OF THE GRANULES TO A MINIMUM.
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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |