Patent US5360701A successfully refreshed from Google Patents.
US5360701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic backing for photographic roll film
Assignee: UBS AG
•
Filing: 1993-04-19
•
Granted: 1994-11-01
•
Expires: 2013-04-19
Abstract
Abstract There is provided a roll film assembly which comprises a length of photographic film having attached to each end thereof a length of backing paper, the film and the backing paper being wound together on a flanged spool, the backing paper being a laminate of paper and polyethylene which comprises as an opaqueing agent a layer of polyethylene which comprises from 7 to 10% by weight of carbon black particles of which from 20 to 100% by weight are conductive carbon particles.
Inventors
- 👤 Peter J. Elton
- 👤 John C. Clarke
- 👤 John L. Cawse
- 👤 George Littler
- 👤 Andrew Wigglesworth
- 👤 Peter J. Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/18; B32B27/32; G; G03; G03C; G03C3/00; G03C3/02; B32B2309/00; B32B2309/02; B32B2323/00; B32B2323/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A method of preparing an antistatic roll film backing paper for photographic roll film, comprising: applying a polyethylene layer to a paper substrate; applying an opaquing layer to said polyethylene layer at a temperature sufficient to melt the polyethylene, said opaquing layer comprising polyethylene and from about 7 to 10% by weight of a mixture of conductive and non-conductive carbon black particles, said mixture containing from 20 to 80% by weight of conductive carbon black particles.
Claim 2
Independent Claim
76 words
A method of preparing an antistatic roll film backing paper for photographic roll film, comprising: applying a polyethylene layer to a paper substrate; applying an opaquing layer to said polyethylene layer at a temperature sufficient to melt the polyethylene, said opaquing layer comprising polyethylene and from about 7 to 10% by weight of a mixture of conductive and non-conductive carbon black particles, said mixture containing from 20 to 80% by weight of conductive carbon black particles.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said mixture contains from 30 to 80% by weight of conductive carbon black particles.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein said mixture contains about 70% by weight of conductive carbon black particles.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein said polyethylene layer applied to said paper is free of carbon black particles.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said polyethylene layer is applied to said paper substrate as a latex emulsion.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein said polyethylene latex emulsion is a polyethylene copolymer latex emulsion.
Claim 8
Dependent Claim
29 words
The method of claim 5 wherein said latex emulsion layer is applied to the substrate as an aqueous coating which is dried prior to application of said opaquing layer.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein said polyethylene layer is extruded onto said paper substrate.
Claim 10
Dependent Claim
24 words
The method of claim 8 wherein the polyethylene layer is extruded onto the paper substrate at a temperature of between 300° and 320° C.
References Cited (Backward Citations)
BE741377A
Cited
US4301239A
Cited
US4312937A
Cited
US4476153A
Cited
US4705746A
Cited
JPS60260041A
Cited
US4702860A
Cited
US4701359A
Cited
US4816363A
Cited
GB2222700A
Cited
US5214091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |