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US3420801A
Expired / Lapsed
US
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Process for the manufacture of polyethylene terephthalate
Assignee: Kalle GmbH and Co KG
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Filing: 1964-02-07
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Granted: 1969-01-07
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Expires: 1984-02-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert Fitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/87; C08G63/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2465319A
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US2921051A
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US3070575A
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US3057824A
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US3055869A
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US3110547A
Cited
US3194791A
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US3245959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |