US4404256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface fluorinated polymers
Assignee: Massachusetts Institute of Technology
•
Filing: 1980-12-01
•
Granted: 1983-09-13
•
Expires: 2000-12-01
Abstract
Abstract Polymers having a substantially completely fluorinated surface of low surface energy and substantially free of oxygen and having a thickness up to about 200 Angstroms, the remainder of the polymer comprising a non-fluorinated polymer.
Inventors
- 👤 Madhu Anand
- 👤 Raymond F. Baddour
- 👤 Robert E. Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:10
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/129; C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08J; C08J7/00; C08J7/12; C08J7/126; B01J2219/00; B01J2219/08; B01J2219/0803; B01J2219/0805; B01J2219/0845; B01J2219/0847; B01J2219/0894; B01J2219/0896; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A fluorinated polymeric article having a substantially completely fluorinated surface of low surface energy and substantially free of oxygen and having a thickness up to about 200 Angstroms, the remainder of said article comprising a non-fluorinated polymer, said fluorinated surface being formed by fluorinating the surface of said polymeric article comprising said non-fluorinated polymer.
Claim 2
Dependent Claim
54 words
A fluorinated polymeric article having a substantially completely fluorinated surface of low surface energy and substantially free of oxygen and having a thickness up to about 200 Angstroms, the remainder of said article comprising a non-fluorinated polymer, said fluorinated surface being formed by fluorinating the surface of said polymeric article comprising said non-fluorinated polymer.
Claim 3
Dependent Claim
10 words
The article of claim 1 wherein said polymer is polyethylene.
Claim 4
Dependent Claim
10 words
The article of claim 1 wherein said polymer is polypropylene.
Claim 5
Dependent Claim
11 words
The article of claim 1 wherein said polymer is a polyamide.
Claim 6
Dependent Claim
10 words
The article of claim 1 wherein said polymer is polyisobutylene.
Claim 7
Dependent Claim
10 words
The article of claim 1 wherein said polymer is polystyrene.
Claim 8
Dependent Claim
15 words
The article of claim 1 wherein said polymer is a copolymer of ethylene and propylene.
Claim 9
Dependent Claim
17 words
The article of claim 1 wherein the surface thickness ranges from about 30 to about 100 Angstroms.
Claim 10
Dependent Claim
32 words
The article of claim 1 wherein the surface of the polymer is substantially completely fluorinated in that at least about 95% of the hydrogen atoms have been replaced with fluorinated non-hydrogen species.
Claim 11
Dependent Claim
23 words
The article of claim 1 wherein the low energy surface is a surface having a free energy of less than about 20 dynes/cm.
Claim 12
Dependent Claim
9 words
A solvent barrier comprising the article of claim 1.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |