US3662178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track-registration process
Assignee: General Electric Co
•
Filing: 1970-02-09
•
Granted: 1972-05-09
•
Expires: 1990-02-09
Abstract
Abstract A pre-etching treatment of a track-registration film wherein the irradiated film is exposed to ultra-violet radiation immersed in oxygenated water whereby the damage tracks are sensitized while annealing of the damage tracks is prevented.
Inventors
- 👤 Roger W Caputi
- 👤 Wayne T Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:04
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/36; C25D3/00; C25D3/02; C25D3/38; G; G01; G01T; G01T5/00; G01T5/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
The process according to claim 1 wherein said energetic particles are alpha particles and said track-registration material comprises cellulose materials.
Claim 2
Dependent Claim
21 words
The process according to claim 1 wherein said energetic particles are fission fragments and said track-registration material comprises a polycarbonate resin.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein said electromagnetic radiation is ultra-violet radiation.
Claim 4
Dependent Claim
22 words
The process according to claim 4 wherein said ultra-violet radiation has wavelengths in the region from about 3,600 to about 3,800 angstroms.
Claim 5
Dependent Claim
13 words
The process according to claim 1 wherein said electromagnetic radiation is gamma radiation.
Claim 6
Dependent Claim
12 words
The process according to claim 1 wherein said electromagnetic radiation is X-radiation.
Claim 7
Dependent Claim
53 words
A track registration process comprising the steps of irradiating a track-registration material with energetic particles which form damage tracks along paths in said material traversed by said energetic particles; submerging said irradiated material in an oxygen-containing liquid coolant; and exposing the irradiated material to electromagnetic radiation having wavelengths less than about 4,000 angstroms.
Claim 8
Dependent Claim
14 words
The process according to claim 8 wherein said oxygen-containing liquid coolant is hydrogen peroxide.
Claim 9
Dependent Claim
20 words
The process according to claim 8 wherein said energetic particles are alpha particles and said track-registration material comprises cellulose materials.
Claim 10
Dependent Claim
21 words
The process according to claim 8 wherein said energetic particles are fission fragments and said track-registration material comprises a polycarbonate resin.
Claim 11
Dependent Claim
45 words
The process according to claim 11 wherein after exposure to said electromagnetic radiation said irradiated material is immersed in an etching solution comprising about 6-normal sodium hydroxide at a temperature of from about 50* C. to about 80* C. for about 5 to 20 minutes.
Claim 12
Dependent Claim
13 words
The process according to claim 8 wherein said electromagnetic radiation is ultra-violet radiation.
Claim 13
Dependent Claim
22 words
The process according to claim 13 wherein said ultra-violet radiation has wavelengths in the region from about 3,600 to about 3,800 angstroms.
Claim 14
Dependent Claim
13 words
The process according to claim 8 wherein said electromagnetic radiation is gamma radiation.
Claim 15
Dependent Claim
12 words
The process according to claim 8 wherein said electromagnetic radiation is X-radiation.
References Cited (Backward Citations)
US3501636A
Cited
US3505523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |