Patent US3376537A successfully refreshed from Google Patents.
Patent US3210147A successfully refreshed from Google Patents.
US3210147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insolubilized and flame retardant phosphorylated polyvinyl alcohol fibers
Assignee: Monsanto Co
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Filing: 1960-07-11
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Granted: 1965-10-05
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Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 John H Johnson
- 👤 Joseph E Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:41
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/356; D06M15/3564; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A FLAME-RETARDANT FIBROUS MATERIAL OBTAINED BY TREATING HYDROLYZED AND SUBSEQUENTLY ACETALIZED POLYVINYL LOWER ALKANOATE IN FIBROUS FORM AND WHEREIN THE DEGREE OF HYDROLYSIS IS AT LEAST 75% AND THE DEGREE OF ACETALIZATION IS FROM 10% TO 70% OF THE HYDROXY GROUPS PROVIDED BY SAID HYDROLYSIS, WITH AN AQUEOUS SOLUTION OF HYDROLYZED AND SUBSEQUENTLY PHOSPHORYLATED POLYVINYL LOWER ALKANOATE WHEREIN THE DEGREE OF HYDROLYSIS IS AT LEAST 75%, SAID PHOSPHORYLATION BEING THE REPLACEMENT OF AT LEAST 20% OF THE HYDROXY GROUPS PROVIDED BY AND HYDROLYSIS WITH THE RADICAL
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |