Patent US3658952A successfully refreshed from Google Patents.
US3658952A
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Bis((dialkyl)phosphonoalkylamido) alkyls
Assignee: BASF Schweiz AG
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Filing: 1969-07-01
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Granted: 1972-04-25
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Expires: 1989-07-01
Abstract
Abstract PHOSPHORUS-CONTAINING REACTION PRODUCTS OF A (METHYLENE)- OR (DIMETHYLENE ETHER)-BIS-(DIALKYL PHOSPHONOPROPIONIC ACID AMIDE) AND FORMALDEHYDE OR A FORMALDEHYDE RELEASING AGENT, FOR FLAME-PROOFING FIBER MATERIALS CONTAINING CELLULOSE ADVANTAGEOUSLY TOGETHER WITH A CURABLE AMINOPLAST PRECONDENSATE.
Inventors
- 👤 Hermann Nachbur
- 👤 Arthur Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:39
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; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5353; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |