US3690941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for providing cellulose fibre material with a flame-proof finish fast to washing
Assignee: Hoechst AG
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Filing: 1970-12-08
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Granted: 1972-09-12
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Expires: 1990-12-08
Abstract
Abstract CELLULOSE FIBER MATERIASL ARE RENDERED FLAME PROOF AND FAST TO WASHING BY (A) IMPREGNATION WITH AQUEOUS BATH CONTAINING PHOSPHORIC ACID ESTERS WITH N-METHYLOL GROUPS AND, OPTIONALLY, AMINOPLAST PRECONDENSATES AND/OR AMINOPLAST CONDENSATION CATALYSTS, AND (B) SUBSEQUENT HEAT TREATMENT.
Inventors
- 👤 Martin Reuter
- 👤 Claus Beermann
- 👤 Fritz Linke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |