US3826650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy photopolymer duplicating stencil
Assignee: Primerica Inc
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Filing: 1972-08-25
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Granted: 1974-07-30
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Expires: 1992-08-25
Abstract
Abstract A STENCIL IS PREPARED FROM A SUPPORT SUCH AS PAPER, SILK OR NYLON, METAL OR METAL COATED MATERIAL WHICH IS COATED WITH AN EPOXY-DIAZONIUM COMPOSITION, THE SURFACE OF THE MATERIAL IS EXPOSED TO AN ENERGY SOURCE, PREFERABLY ACTINIC RADIATION, IN AN IMAGE WISE MANNER TO EFFECT POLYMERIZATION OF SAID COMPOSITION AND UNPOLYMERIZED COMPOSITION IS REMOVED, PREFERABLY BY WASHING WITH A SOLVENT.
Inventors
- 👤 S Schlesinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:21
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/105; C08G65/12; G03C; G03C5/00; G03C5/60; G03F7/016; G03F7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/31504; Y10T428/31511; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |