US4207374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant film
Assignee: 3M Co
•
Filing: 1978-05-05
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Granted: 1980-06-10
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Expires: 1998-05-05
Abstract
Abstract A flexible, fire retardant electrically insulating film material comprising a thermoplastic film backing and a thermoset fire retardant coating on one or both surfaces of the backing. Preferably, a pressure sensitive adhesive coating is applied to either the film backing or overcoated on the thermoset coating.
Inventors
- 👤 Gaylord L. Groff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:34
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2848; Y10T428/2852; Y10T428/287; Y10T428/31504; Y10T428/31511; Y10T428/31786; Y10T428/31794; Y10T428/31797
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
31 words
A flame-retardant, flexible, electrically insulating film material comprising a flexible thermoplastic film backing having a flexible coating on at least one surface thereof, said coating comprising a thermoset fire-retardant resin composition.
Claim 2
Dependent Claim
31 words
A flame-retardant, flexible, electrically insulating film material comprising a flexible thermoplastic film backing having a flexible coating on at least one surface thereof, said coating comprising a thermoset fire-retardant resin composition.
Claim 3
Dependent Claim
27 words
The film material of claim 1 wherein said resin composition comprises a fire retardant reaction product of a branch-chain acid-terminated polyester and at least one epoxy compound.
Claim 4
Dependent Claim
32 words
The film material of claim 1 further containing a second fire retardant coating on the backside of said film backing, said second fire retardant coating comprising a thermoset fire retardant resin composition.
Claim 5
Dependent Claim
33 words
The film material of claim 3 wherein each of said fire retardant resin compositions is comprised of a fire retardant reaction product of a branch-chain acid-terminated polyester and at least one epoxy compound.
Claim 6
Dependent Claim
13 words
The film material of claim 1 wherein said film backing is a polyester.
Claim 7
Dependent Claim
47 words
A flame-retardant, flexible, electrically insulating pressure sensitive tape comprising a flexible thermoplastic film backing having a pressure sensitive adhesive coating on one surface thereof, and having a flexible fire retardant coating on the other surface thereof, said fire retardant coating comprising a thermoset fire retardant resin composition.
Claim 8
Dependent Claim
47 words
A flame-retardant, flexible, electrically insulating pressure sensitive tape comprising a flexible thermoplastic film backing having a pressure sensitive adhesive coating on one surface thereof, and having a flexible fire retardant coating on the other surface thereof, said fire retardant coating comprising a thermoset fire retardant resin composition.
Claim 9
Dependent Claim
26 words
The tape of claim 6 wherein said resin composition comprises a fire retardant reaction product of a branch-chain acid-terminated polyester and at least one epoxy compound.
Claim 10
Dependent Claim
12 words
The tape of claim 6 wherein said film backing is a polyester.
Claim 11
Dependent Claim
13 words
The tape of claim 6 wherein said pressure sensitive adhesive is fire retardant.
Claim 12
Dependent Claim
45 words
A flame retardant, flexible, electrically insulating pressure sensitive tape comprising a flexible thermoplastic film backing having a fire retardant coating on one surface thereof, said coating comprising a thermoset fire retardant resin composition, and overlying said coating a second coating comprising a pressure sensitive adhesive.
Claim 13
Dependent Claim
45 words
A flame retardant, flexible, electrically insulating pressure sensitive tape comprising a flexible thermoplastic film backing having a fire retardant coating on one surface thereof, said coating comprising a thermoset fire retardant resin composition, and overlying said coating a second coating comprising a pressure sensitive adhesive.
Claim 14
Dependent Claim
26 words
The tape of claim 10 wherein said resin composition comprises a fire retardant reaction product of a branch-chain acid-terminated polyester and at least one epoxy compound.
Claim 15
Dependent Claim
31 words
The tape of claim 10 further containing a second fire retardant coating on the backside of said film backing, said second fire retardant coating comprising a thermoset fire retardant resin composition.
Claim 16
Dependent Claim
32 words
The tape of claim 12 wherein each of said fire retardant resin compositions is comprised of a fire retardant reaction product of a branch-chain acid-terminated polyester and at least one epoxy compound.
Claim 17
Dependent Claim
12 words
The tape of claim 10 wherein said film backing is a polyester.
Claim 18
Dependent Claim
13 words
The tape of claim 10 wherein said pressure sensitive adhesive is fire retardant.
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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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |