Patent US3787687A successfully refreshed from Google Patents.
US3787687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet radiation dosimeter
Assignee: Individual
•
Filing: 1972-02-23
•
Granted: 1974-01-22
•
Expires: 1992-02-23
Abstract
Abstract An ultraviolet radiation dosimeter is provided that comprises a transparent or white film containing a 1,3,3trimethylindolinobenzopyrylospiran and adjacent to the film a color chart having at least two shades of the color to which the substituted spiropyran changes upon exposure to ultraviolet radiation.
Inventors
- 👤 T Trumble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:27
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/04; G01J; G01J1/00; G01J1/48; G01J1/50
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
91 words
An ultraviolet radiation dosimeter comprising a base; a polymeric film containing a 1,3,3trimethylindolinobenzopyrylospiran positioned on a portion of the base; a filter positioned on the polymeric film, the filter being adapted to eliminate ultraviolet rays having short wavelengths; and a color chart positioned on the base adjacent the polymeric film, the chart consisting of a plurality of pieces of colored transparent film of varying lengths superimposed upon one another, the basic color of the color chart film being the same as that of the polymeric film after exposure to ultraviolet radiation.
Claim 2
Dependent Claim
91 words
An ultraviolet radiation dosimeter comprising a base; a polymeric film containing a 1,3,3trimethylindolinobenzopyrylospiran positioned on a portion of the base; a filter positioned on the polymeric film, the filter being adapted to eliminate ultraviolet rays having short wavelengths; and a color chart positioned on the base adjacent the polymeric film, the chart consisting of a plurality of pieces of colored transparent film of varying lengths superimposed upon one another, the basic color of the color chart film being the same as that of the polymeric film after exposure to ultraviolet radiation.
Claim 3
Dependent Claim
24 words
preparing a color chart of at least two different shades of the same color to which the film changes upon exposure to ultraviolet radiation;
Claim 4
Dependent Claim
24 words
preparing a color chart of at least two different shades of the same color to which the film changes upon exposure to ultraviolet radiation;
Claim 5
Dependent Claim
16 words
The dosimeter according to claim 1 in which the polymeric film is a transparent polymeric film.
Claim 6
Dependent Claim
24 words
preparing a color chart of at least two different shades of the same color to which the film changes upon exposure to ultraviolet radiation;
Claim 7
Dependent Claim
24 words
preparing a color chart of at least two different shades of the same color to which the film changes upon exposure to ultraviolet radiation;
Claim 8
Dependent Claim
10 words
exposing the transparent film to ultraviolet radiation of known intensity;
Claim 9
Dependent Claim
10 words
exposing the transparent film to ultraviolet radiation of known intensity;
Claim 10
Dependent Claim
16 words
The dosimeter according to claim 1 in which the polymeric film is a white polymeric film.
Claim 11
Dependent Claim
10 words
exposing the white film to ultraviolet radiation of known intensity;
Claim 12
Dependent Claim
10 words
exposing the white film to ultraviolet radiation of known intensity;
Claim 13
Dependent Claim
27 words
recording the time of exposure to and level of ultraviolet radiation required for the film to change to the color of each shade of the color chart;
Claim 14
Dependent Claim
27 words
recording the time of exposure to and level of ultraviolet radiation required for the film to change to the color of each shade of the color chart;
Claim 15
Dependent Claim
27 words
recOrding the time of exposure to and level of ultraviolet radiation required for the film to change to the color of each shade of the color chart;
Claim 16
Dependent Claim
27 words
recOrding the time of exposure to and level of ultraviolet radiation required for the film to change to the color of each shade of the color chart;
Claim 17
Dependent Claim
16 words
The dosimeter according to claim 1 in which the 1,3,3-trimethylindolinobenzopyrylospiran corresponds to the following structural formula:
Claim 18
Dependent Claim
26 words
The dosimeter according to claim 1 in which the polymeric film and the color chart are positioned on a flat base formed of a white material.
Claim 19
Dependent Claim
13 words
heating the film, thereby causing it to revert to its original white state;
Claim 20
Dependent Claim
13 words
heating the film, thereby causing it to revert to its original white state;
Claim 21
Dependent Claim
13 words
heating the film, thereby causing it to revert to its original transparent state;
Claim 22
Dependent Claim
13 words
heating the film, thereby causing it to revert to its original transparent state;
Claim 23
Dependent Claim
22 words
placing the color chart and film in its transparent state in the environment in which the individual or object is located; and
Claim 24
Dependent Claim
22 words
placing the color chart and film in its transparent state in the environment in which the individual or object is located; and
Claim 25
Dependent Claim
22 words
placing the color chart and film in its white state in the environment in which the individual or object is located; and
Claim 26
Dependent Claim
22 words
placing the color chart and film in its white state in the environment in which the individual or object is located; and
Claim 27
Dependent Claim
31 words
The dosimeter according to claim 1 in which the polymeric film is formed of a polymer or resin selected from the group consisting of alkyds, phenolics, amino resins, vinyls and acrylates.
Claim 28
Dependent Claim
24 words
comparing the color of the film with the color chart to determine the dosage of ultraviolet radiation to which the individual has been subjected.
Claim 29
Dependent Claim
24 words
comparing the color of the film with the color chart to determine the dosage of ultraviolet radiation to which the individual has been subjected.
Claim 30
Dependent Claim
19 words
The dosimeter according to claim 6 in which the polymeric film is polymethacrylate and the 1,3,3-trimethylindolinobenzopyrylospiran is 6''-nitro-8'' -methoxy-1,3,3-trimethylindolinobenzopyrylospiran.
Claim 31
Dependent Claim
24 words
comparing the color of the film with the color chart to determine the dosage of ultraviolet radiation to which the individual has been subjected.
Claim 32
Dependent Claim
24 words
comparing the color of the film with the color chart to determine the dosage of ultraviolet radiation to which the individual has been subjected.
Claim 33
Dependent Claim
25 words
The dosimeter according to claim 6 in which the ratio of the 1,3,3-trimethylindolinobenzopyrylospiran to polymer or resin, on a weight basis, is 0.25:1 to 20:70.
Claim 34
Independent Claim
22 words
A method for determining the dosage of ultraviolet radiation to which an individual or object is subjected which comprises the steps of:
Claim 35
Independent Claim
22 words
A method for determining the dosage of ultraviolet radiation to which an individual or object is subjected which comprises the steps of:
Claim 36
Dependent Claim
38 words
The method according to claim 9 in which the transparent film comprises a resin or polymer selected from the group consisting of alkyds, phenolics, amino resins, vinyls and acrylates and the 1,3,3-trimethylindolinobenzopyrylospiran corresponds to the following structural formula:
Claim 37
Dependent Claim
17 words
The method according to claim 10 in which the polymer is polymethacrylate and the 1,3,3-trimethylindolinobenzopyrylospiran is 6''-nitro-8''-methoxy-1,3,3-trimethylindolinobenzopyrylospiran.
Claim 38
Dependent Claim
14 words
The method according to claim 10 in which the film contains a white pigment.
Claim 39
Independent Claim
22 words
A method for determining the dosage of ultraviolet radiation to which an individual or object is subjected which comprises the steps of:
Claim 40
Independent Claim
22 words
A method for determining the dosage of ultraviolet radiation to which an individual or object is subjected which comprises the steps of:
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |