Patent US3825630A successfully refreshed from Google Patents.
US3825630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonate carbamates
Assignee: JP Stevens and Co Inc
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Filing: 1973-04-30
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Granted: 1974-07-23
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Expires: 1993-04-30
Abstract
Abstract THIS INVENTION RELATES TO PHOSPJORUS-CONTAINING CARBAMATES HAVING AT LEAST ONE N-METHYLOL OR N-ALKOXYMETHYL GROUP. THESE COMPOUNDS CAN BE USED TO IMPART DURABLE FLAME-RETARDANT PROPERTIES TO CELLULOSE-CONTAINING SUBSTRATES.
Inventors
- 👤 S Sello
- 👤 B Gaj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/285; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/32; C07F9/3205; C07F9/3211; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; 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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |