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Patent US4482591A successfully refreshed from Google Patents.
US4482591A
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Polyvinyl butyrate pellicle compositions and pellicles thereof for projection printing
Assignee: Avantor Performance Materials LLC
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Filing: 1983-03-08
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Granted: 1984-11-13
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Expires: 2003-03-08
Abstract
Abstract A pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from a polyvinyl butyral resin or from a casting composition which is a mixture of a polyvinyl butyral resin and a dispersion of colloidal silica and a silicone resin which is a lower aliphatic alcohol-water solution of the partial condensate of a silanol. A pellicle employing such films are useful in the near, mid and deep UV regions.
Inventors
- 👤 Irl E. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/62; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/20; Y; Y10; Y10T; Y10T428/00; Y10T428/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A pellicle for use in projection printing comprising a cast polyvinyl butyral film mounted in a pellicle mounting ring and wherein the polyvinyl butyral has the formula ##STR4## wherein x is ≦0.13, y is ≦0.02 and z is ≧0.88.
Claim 2
Dependent Claim
39 words
A pellicle for use in projection printing comprising a cast polyvinyl butyral film mounted in a pellicle mounting ring and wherein the polyvinyl butyral has the formula ##STR4## wherein x is ≦0.13, y is ≦0.02 and z is ≧0.88.
Claim 3
Dependent Claim
20 words
A pellicle of claim 1 wherein x is about 0.09 to about 0.13, y is about 0.0 to about 0.02.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |