US3499873A
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Preparation of polyethylene terephthalate by means of free falling films
Assignee: Vickers Zimmer AG
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Filing: 1968-05-24
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Granted: 1970-03-10
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Expires: 1988-05-24
Abstract
No abstract record available.
Inventors
- 👤 Heinz Kuehne
- 👤 Manfred Dietze
- 👤 Franz Hauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B; B01; B01F; B01F27/00; B01F27/60; B01F27/73; B01J; B01J19/00; B01J19/18; B01J19/1862; B01J19/1887; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/44; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00132; B01J2219/00135; B01J2219/00164; B01J2219/00166; B01J2219/00182; B01J2219/18; B01J2219/182; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |