US3629196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine and silicon containing polycondensates
Assignee: Hoechst AG
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Filing: 1969-08-21
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Granted: 1971-12-21
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Expires: 1989-08-21
Abstract
Abstract POLYCONDENSATES OF THE FORMULA -(SI(-R)(-(CH2)3-OOC-NH-((CH3-)PHENYLENE)-NH-COO-(CH2)N- RF)-O)Z- IN WHICH R1 IS PERFLUOROALKYL OF 6 TO 12 CARBON ATOMS, R IS A GROUP OF THE FORMULA -O- OR LOWER ALKYL, N IS AN INTEGER OF 1 TO 4 AND Z IS A NUMBER OF FROM ABOUT 10 TO ABOUT 100, ARE USEFUL AS OLEO- AND HYDROPHOBIC AGENTS FOR TEXTILE MATERIALS, ESPECIALLY FOR WOOL AND COTTON.
Inventors
- 👤 Helmut Hahn
- 👤 Siegfried Rebsdat
- 👤 Kasimir Ruchlak
- 👤 Erich Schuierer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:28
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/657
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |