US3926872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant cellulosics containing graft copolymerized acrylic esters or amides
Assignee: Kimberly Clark Tissue Co
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Filing: 1974-09-23
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Granted: 1975-12-16
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Expires: 1994-09-23
Abstract
Abstract Graft copolymerization of cellulosics with specific novel acrylic esters or amides produces essentially permanently fire retardant cellulosic fibers. The fibers can be graft copolymerized before or after the fibers are made into fabrics or webs.
Inventors
- 👤 Nathan Allen Edelson
- 👤 Robert W Faessinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/02; D06M14/04; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/224; C07F9/24; C07F9/2404; C07F9/2408
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
13 words
FLAME RETARDANT CELLULOSIC FIBERS GRAFT COPOLYMERIZED WITH SUFFICIENT COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
FLAME RETARDANT CELLULOSIC FIBERS GRAFT COPOLYMERIZED WITH SUFFICIENT COMPOUND HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
15 words
The flame retardant cellulosic fibers of claim 1 wherein the fibers are in fabric form.
Claim 4
Dependent Claim
20 words
The flame retardant cellulosic fibers of claim 1 having sufficient compound to result in between 0.5% and 5.0% phosphorus content.
Claim 5
Dependent Claim
19 words
The flame retardant cellulosic fibers of claim 1 having sufficient compound to result in between 1.5% and 3.5% phosphorus.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |