US3294889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a printing cylinder
Assignee: Primerica Inc
•
Filing: 1963-02-26
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Granted: 1966-12-27
•
Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Robert H Downie
- 👤 Robert V Hershey
- 👤 Henry W Hoftiezer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:20
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD FOR PREPARING A MULTI-LAYER ROTOGRAVURE CYLINDER BLANK WHICH COMPRISES CASTING ON THE SMOOTH, CYLINDRICAL INNER SURFACE OF A SEAMLESS CASTING MOLD A THIN, EVEN LAYER OF A SOLID PHOTOSENSITIVE POLYMERIC COMPOSITION, CASTING UNDER CENTRIFUGAL PRESSURE AT LEAST ONE BACK-UP LAYER OF A CASTING RESIN IN INTIMATE, OVER-ALL ADHERING CONTACT WITH SAID PHOTOSENSITIVE COMPOSITION LAYER, CENTERING WITHIN THE CYLINDRICAL INTERIOR OF SAID MOLD A SHAFT OF LESSER DIAMETER THAN THE INTERIOR OF THE DOUBLY COATED MOLD, FILLING THE SPACE BETWEEN SAID SHAFT AND SAID BACK-UP RESIN LAYER WITH A FILLER LAYER OF A CASTING RESIN, SETTING SAID FILLER LAYER, CHILLING THE MOLD ASSEMBLY, AND REMOVING FROM THE MOLD THE COMPOSITE, MULTI-LAYER ROTOGRAVURE CYLINDER BANK HAVING A THIN LAYER OF PHOTOSENSITIVE POLYMERIC COMPOSITION AS THE SURFACE LAYER THEREOF.
Claim 2
Independent Claim
128 words
A METHOD FOR PREPARING A MULTI-LAYER ROTOGRAVURE CYLINDER BLANK WHICH COMPRISES CASTING ON THE SMOOTH, CYLINDRICAL INNER SURFACE OF A SEAMLESS CASTING MOLD A THIN, EVEN LAYER OF A SOLID PHOTOSENSITIVE POLYMERIC COMPOSITION, CASTING UNDER CENTRIFUGAL PRESSURE AT LEAST ONE BACK-UP LAYER OF A CASTING RESIN IN INTIMATE, OVER-ALL ADHERING CONTACT WITH SAID PHOTOSENSITIVE COMPOSITION LAYER, CENTERING WITHIN THE CYLINDRICAL INTERIOR OF SAID MOLD A SHAFT OF LESSER DIAMETER THAN THE INTERIOR OF THE DOUBLY COATED MOLD, FILLING THE SPACE BETWEEN SAID SHAFT AND SAID BACK-UP RESIN LAYER WITH A FILLER LAYER OF A CASTING RESIN, SETTING SAID FILLER LAYER, CHILLING THE MOLD ASSEMBLY, AND REMOVING FROM THE MOLD THE COMPOSITE, MULTI-LAYER ROTOGRAVURE CYLINDER BANK HAVING A THIN LAYER OF PHOTOSENSITIVE POLYMERIC COMPOSITION AS THE SURFACE LAYER THEREOF.
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |