US4762564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced cellulose aminomethanate
Assignee: Devro Teepak Inc
•
Filing: 1987-03-13
•
Granted: 1988-08-09
•
Expires: 2007-03-13
Abstract
Abstract A reinforced article comprising cellulose aminomethanate containing a reinforcing fiber, wherein 0.5 to 30 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups.
Inventors
- 👤 Douglas J. Bridgeford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:13
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08B; C08B15/00; C08B15/05; C08B15/06; D; D01; D01F; D01F2/00; C08J2301/00; C08J2301/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2869
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
27 words
A reinforced article comprising cellulose aminomethanate containing a reinforcing fiber, wherein 0.5 to 30 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups.
Claim 2
Dependent Claim
27 words
A reinforced article comprising cellulose aminomethanate containing a reinforcing fiber, wherein 0.5 to 30 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups.
Claim 3
Dependent Claim
11 words
The article of claim 1 wherein the article is a film.
Claim 4
Dependent Claim
11 words
The article of claim 1 wherein the article is a fiber.
Claim 5
Dependent Claim
23 words
The film of claim 2 wherein from 5 to 15 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups.
Claim 6
Dependent Claim
19 words
The film of claim 2 wherein the average degree of polymerization is from 450 to 650 combined glucose units.
Claim 7
Dependent Claim
14 words
The film of claim 2 wherein the cellulose has been at least partially regenerated.
Claim 8
Dependent Claim
23 words
The fiber article of claim 3 wherein the fiber article has a diameter of at least 10 times that of the reinforcing fiber.
Claim 9
Dependent Claim
23 words
The fiber of claim 3 wherein from 5 to 15 numerical percent of the cellulose hydroxy groups have been substituted with aminomethanate groups.
Claim 10
Dependent Claim
23 words
The fiber of claim 3 wherein the average degree of polymerization is from 450 to 650 combined substituted and unsubstituted anhydrous glucose units.
Claim 11
Dependent Claim
17 words
The film of claim 2 wherein the film comprises a fiber mat impregnated with the cellulose aminomethanate.
Claim 12
Dependent Claim
14 words
The film of claim 10 wherein the fiber mat is a cellulose fiber paper.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |