Patent US3552961A successfully refreshed from Google Patents.
US3552961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic vesicular materials and imaging process therefor
Assignee: Kalvar Corp
•
Filing: 1969-12-31
•
Granted: 1971-01-05
•
Expires: 1989-12-31
Abstract
Abstract VESICULAR PHOTOGRAPHIC MATERIALS COMPRISING A POLYMERIC VEHICLE AND A LIGHT DECOMPOSABLE AGENT. THE POLYMERIC MATERIAL IS A MIXTURE OF RESIN A AND A RESIN B. BY ADJUSTING THE RELATIVE PROPORTIONS OF THESE RESINS, THE PHOTOGRAPHIC GAMMA OF THE FILM CAN BE ALTERED. THE RESIN A IS AN ESTER OR ACETAL OF POLYVINYL ALCOHOL. THE RESIN B IS AN EPOXY RESIN, A PHENOL FORMALDEHYDE RESIN, A UREAFORMALDEHYDE RESIN, A MELAMINE-FORMLDEHYDE RESIN, A CELLULOSE ESTER, A SILICONE RESIN, AN ISOCYANATE RESIN OR A COPOLYMER OF MALEIC ANHYDRIDE WITH STYRENE. PREFERABLY, THE AMOUNT OF RESIN A IS AT LEAST 50% AND THE AMOUNT OF RESIN B IS UP TO 50%.
Inventors
- 👤 Norman T Notley
- 👤 Irwin M Senentz Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/11; Y10S430/112
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |