Patent US5827283A successfully refreshed from Google Patents.
Patent US3737284A successfully refreshed from Google Patents.
US3737284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tris(hydroxymethyl)phosphine phosphates as flame retardants for textile materials
Assignee: Wyeth Holdings LLC
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Filing: 1971-04-23
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Granted: 1973-06-05
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Expires: 1991-04-23
Abstract
Abstract DURABLE FLAME RETARDANT FINISHES FOR TEXTILES COMPRISING AQUEOUS SOLUTIONS OF TRIS(HYDROXYMETHYL)PHOSPHINE, PHOSPHORIC ACID AND A METHYLOLATED NITROGENOUS CELLULOSE REACTANT.
Inventors
- 👤 S Obrien
- 👤 R Stockel
- 👤 W Herbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:59
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/433
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |