US3709940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus compounds for flameproofing fabrics
Assignee: Quehl & Co dt GmbH
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Filing: 1971-03-03
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Granted: 1973-01-09
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Expires: 1991-03-03
Abstract
Abstract ORGANIC PHOSPHOURS OF THE GENERAL FORMULA (O=P(-CH2-OH)2-CH2-CH2-CO-N(-CH2-O-R)-CH2-P(-CH2-OH)3)+ X- IN WHICH R IS H OR C1-3 ALKYL AND X IS HALOGEN OR OH, ARE USEFUL FOR FLAMERPROFING TEXTILES, ESPECIALLY TEXTILES INCLUDING CELLULOSIC FIBERS.
Inventors
- 👤 W Flugel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:59
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5304
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |