US2917779A
Expired / Lapsed
US
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Process for preparing improved thin shaped structures, such as filaments or foils, from linear polyesters
Assignee: Hoechst AG
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Filing: 1956-05-08
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Granted: 1959-12-22
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Expires: 1976-05-08
Abstract
No abstract record available.
Inventors
- 👤 Kurzke Herbert
- 👤 Sattler Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:02
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; B; B29; B29D; B29D7/00; D01; D01D; D01D5/00; D01D5/20; D01F; D01F6/00; D01F6/58; D01F6/62; D02J1/221; D02J1/223; Y; Y10; Y10S; Y10S260/00; Y10S260/23
Claims Analysis
Total Claims: 0
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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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |