Patent US3661660A successfully refreshed from Google Patents.
US3661660A
Expired / Lapsed
US
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Method for ultrasonic etching of polymeric printing plates
Assignee: WR Grace and Co
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Filing: 1970-08-31
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Granted: 1972-05-09
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Expires: 1990-08-31
Abstract
Abstract The invention disclosed is a method for ultrasonic etching of polymeric printing plates. The method includes an etching bath energized by means of ultrasonic energy, a water spray bath, and an air dryer. The method for ultrasonic etching of polymeric printing plates includes the steps of immersing a polymeric printing plate in an etching bath, energized by ultrasonic energy, washing the polymeric printing plate in a water spray cleaning bath after ultrasonic etching, and air drying the water washed polymeric printing plate in a current of heated air.
Inventors
- 👤 Forrest A Wessells
- 👤 Donald P Gush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3014; B; B01; B01J; B01J19/00; B01J19/08; B01J19/10; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B3/12; C; C08; C08F; C08F283/00; C08F283/01; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/81; C08G18/8108; C08G18/83; C08G18/834; C08G18/835; C08G75/00; C08G75/02; C08G75/04; C08G75/045; G03F7/004; G03F7/027; G03F7/0275; G03F7/16; G03F7/20; G03F7/2002; G03F7/2012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
The method of claim 1 wherein the ultrasonic energy level of the bath varies between about 18 to about 40 kilocycles.
Claim 2
Dependent Claim
33 words
The method of claim 1 wherein the curing rate accelerator is selected from the group consisting of benzophenone, acetophenone, acenapthenequinone, methyl ethyl ketone, dibenzosuberone, thioxanthen-9-one, xanthen-9-one, 7-H-benx anthracen-7-one, fluorene-9-one, 1-indanone, and mixtures thereof.
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) | 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 |