US3697276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylcarbazole photographic systems
Assignee: Horizons Research Inc
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Filing: 1971-02-01
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Granted: 1972-10-10
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Expires: 1991-02-01
Abstract
Abstract COMPOSITIONS SUITABLE FOR PHOTOGRAPHIC DUPLICATION AND REPRODUCTION EITHER BY PROJECTION OR CONTACT PRINTING, THE COMPOSITION COMPRISING AT LEAST ONE N-VINYL MONOMER, SUCH AS N-VINYLCARBAZOLE, DISPERSED IN POLYVINYLCARBAZOLE ALONG WITH A FREE RADICAL SOURCE, SUCH AS IODOFORM, AND THE PROCEDURES WHEREBY SUCH COMPOSITIONS ARE UTILIZED.
Inventors
- 👤 James M Lewis
- 👤 John E Shirey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:33
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029; G03F7/0295
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |