Patent US4172724A successfully refreshed from Google Patents.
US4172724A
Expired / Lapsed
US
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Hologram and method of production thereof
Assignee: Canon Inc
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Filing: 1977-07-27
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Granted: 1979-10-30
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Expires: 1997-07-27
Abstract
Abstract A hologram is produced by causing a crosslinking reaction in accordance with an interference pattern in a recording carrier composed of a polymer containing in its unit structure an aromatic or hetero cyclic ring having a reactive position capable of being substituted by radical.
Inventors
- 👤 Masakazu Matsumoto
- 👤 Katsuhiko Nishide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:02
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/001; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/117; Y10S430/126; Y10S430/128
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A method of producing a hologram comprising the steps of: exposing a recording carrier to an interference pattern of radiant rays, said recording carrier being composed essentially of (1) a polymer containing in its unit structure an aromatic or heterocyclic ring having therein a reactive position capable of being substituted by a radical and (2) a halogen containing compound wherein said polymer and halogen containing compound are crosslinked responsive to said interference pattern; subjecting the exposed recording carrier to a swelling treatment with a first solvent said first solvent dissolving unreacted halogen containing compound; and subjecting the swollen recording carrier to a shrinking treatment with a second solvent.
Claim 2
Independent Claim
108 words
A method of producing a hologram comprising the steps of: exposing a recording carrier to an interference pattern of radiant rays, said recording carrier being composed essentially of (1) a polymer containing in its unit structure an aromatic or heterocyclic ring having therein a reactive position capable of being substituted by a radical and (2) a halogen containing compound wherein said polymer and halogen containing compound are crosslinked responsive to said interference pattern; subjecting the exposed recording carrier to a swelling treatment with a first solvent said first solvent dissolving unreacted halogen containing compound; and subjecting the swollen recording carrier to a shrinking treatment with a second solvent.
Claim 3
Dependent Claim
36 words
A method of producing a hologram as claimed in claim 1, wherein said halogen containing compound is used in an amount of from 0.1 to 200 percent by weight based on the weight of said polymer.
Claim 4
Dependent Claim
36 words
A method of producing a hologram as claimed in claim 1, wherein said halogen containing compound is used in an amount of from 0.5 to 50 percent by weight based on the weight of said polymer.
Claim 5
Dependent Claim
41 words
A method of producing a hologram as claimed in claim 1, wherein said halogen containing compound is a compound of such a structure which has in one molecule at least one carbon to which two or more halogen atoms are attached.
Claim 6
Dependent Claim
29 words
A method of producing a hologram as claimed in claim 1, wherein said halogen containing compound is a iodine substituted compound of hydrocarbon containing two or less carbon atoms.
Claim 7
Dependent Claim
21 words
A method of producing a hologram as claimed in claim 1, wherein said halogen containing compound is a iodine containing compound.
Claim 8
Dependent Claim
18 words
A method of producing a hologram as claimed in claim 1, wherein said radiant ray is a laser.
Claim 9
Dependent Claim
29 words
A method of producing a hologram as claimed in claim 1, wherein said radiant ray is a laser with its bright line being in the visible range of wavelength.
Claim 10
Dependent Claim
25 words
A method of producing a hologram as claimed in claim 1, wherein said recording carrier is hardly dissolved out into said first and second solvents.
Claim 11
Dependent Claim
102 words
A hologram produced by exposing a recording carrier to an interference pattern of radiant rays, said recording carrier being composed essentially of (1) a polymer containing in its unit structure an aromatic or heterocyclic ring having therein a reactive position capable of being substituted by a radical and (2) a halogen containing compound wherein said polymer and halogen containing compound are crosslinked responsive to said interference pattern; subjecting the exposed recording carrier to a swelling treatment with a first solvent, said first solvent dissolving unreacted halogen containing compound; and subjecting the swollen recording carrier to a shrinking treatment with a second solvent.
Claim 12
Dependent Claim
102 words
A hologram produced by exposing a recording carrier to an interference pattern of radiant rays, said recording carrier being composed essentially of (1) a polymer containing in its unit structure an aromatic or heterocyclic ring having therein a reactive position capable of being substituted by a radical and (2) a halogen containing compound wherein said polymer and halogen containing compound are crosslinked responsive to said interference pattern; subjecting the exposed recording carrier to a swelling treatment with a first solvent, said first solvent dissolving unreacted halogen containing compound; and subjecting the swollen recording carrier to a shrinking treatment with a second solvent.
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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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |