Patent US4788115A successfully refreshed from Google Patents.
US4788115A
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Processing holograms
Assignee: UBS AG
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Filing: 1986-12-10
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Granted: 1988-11-29
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Expires: 2006-12-10
Abstract
Abstract Holograms which contain gelatin as the binder are prepared by holographically exposing the material by use of coherent light, developing the holographic image by a chemical or physical process and before processing, simultaneously or subsequently, treating the material with a solution of a gelatin reactive compound which has a molecular weight of over 200 and which reacts with the gelatin to form covalent bonds therewith to increase the molecular bulk of the gelatin.
Inventors
- 👤 William E. Long
- 👤 David W. Butcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:21
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/18; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/3056; G03C5/38; G03C5/39; G03C5/40; G03C5/44; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
A method of preparing a hologram which uses gelatin as the binder which method comprises holographically exposing the material by use of coherent light, developing the holographic image by a chemical or physical process and before processing, simultaneously or subsequently, treating the material with a solution of a gelatin reactive compound which has a molecular weight of over 200 and which reacts with the gelatin to form covalent bond therewith to increase the molecular bulk of the gelatin, the increase in the molecular bulk of the gelatin achieving a bathochromic shift in the replay wavelength of the hologram in the range of from 10 to 248.1 nm.
Claim 2
Independent Claim
107 words
A method of preparing a hologram which uses gelatin as the binder which method comprises holographically exposing the material by use of coherent light, developing the holographic image by a chemical or physical process and before processing, simultaneously or subsequently, treating the material with a solution of a gelatin reactive compound which has a molecular weight of over 200 and which reacts with the gelatin to form covalent bond therewith to increase the molecular bulk of the gelatin, the increase in the molecular bulk of the gelatin achieving a bathochromic shift in the replay wavelength of the hologram in the range of from 10 to 248.1 nm.
Claim 3
Dependent Claim
29 words
A method of preparing a hologram according to claim 1 wherein the gelatin reactive compound comprises a residue of guanidine condensed with an aldehyde and/or at least one amine.
Claim 4
Dependent Claim
91 words
A method of preparing a hologram according to claim 2 wherein the gelatin reactive compound is a condensation compound formed by condensing a non-cyclic compound containing at least once the atomic grouping. ##STR6## in a first stage, with an aldehyde and a salt of an aliphatic amine containng at least two primary or secondary amino groups at a temperature above 100° C., and the product so obtained is further condensed in a second stage with an aldehyde and a water-soluble ammonium salt or amine salt in the presence of a solvent.
Claim 5
Dependent Claim
26 words
A method according to claim 3 wherein the aldehyde used in the first stage condensation and in the second stage condensation is in each case formaldehyde.
Claim 6
Dependent Claim
20 words
A method according to claim 3 wherein the salt of the aliphatic amine used is a salt of ethylene diamine.
Claim 7
Dependent Claim
20 words
A method according to claim 3, wherein the water-soluble ammonium salt used in the second stage condensation is ammonium chloride.
Claim 8
Dependent Claim
29 words
A method according to claim 3 wherein the condensation compound used is the rection product of formaldehyde, ammonium chloride, dicyandiamide and ethylene diamine in a molar ratio of 2:1:1:0.1.
Claim 9
Dependent Claim
33 words
A method according to claim 2 wherein the gelatin reactive compound is a condensation product of formaldehyde, ammonium chloride and dicyandiamide in a molar ratio of 1 to 5:1 to 2:1 to 2.
Claim 10
Dependent Claim
19 words
A method according to claim 2 wherein the gelatin reactive product is a condensation product of diacyandamide and diethylene-triamine.
Claim 11
Dependent Claim
43 words
A method according to claim 1 wherein the gelatin reactive compound is a compound of the general formula: ##STR7## where R is an alkyl group having 1 to 4 carbon atoms x is from 10 to 18 and X - is an anion.
Claim 12
Dependent Claim
15 words
A method according to claim 1 wherein the gelatin reactive product is a reactive dyestuff.
Claim 13
Dependent Claim
23 words
A method according to claim 7 wherein the reactive group in the reactive dyestuff is a substituted monoazine-,diazine-,triazine-,pyrimidine-, acryloyl- or vinyl sulphone- group.
Claim 14
Dependent Claim
13 words
A hologram which has been prepared by the method according to 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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |