US3578457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive diazothioether material
Assignee: US Philips Corp
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Filing: 1969-02-10
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Granted: 1971-05-11
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Expires: 1989-02-10
Abstract
Abstract A PHOTOSENSITIVE MATERIAL WHICH CONSISTS OF A SUPPORT WHICH IS ELECTRICALLY NON-CONDUCTIVE AT LEAST AT ITS SURFACE WITH A PHOTOSENSITIVE LAYER, THE ACTIVE COMPOUND OF WHICH CONSISTS OF AN AROMATIC DIAZOTHIOETHER OF THE TYPE X,(R-S-N=N-)-BENZENE IN WHICH FORMULA X IS ONE OR MORE SUBSTITUENTS, PREFERABLY 4-NITRO OR 3,5-DICHLORO -4- DIMETHYLAMINO, AND IN WHICH FORMULA R IS A BRANCHED OR NON-BRANCHED ALKYL GROUP OR ARALKYL GROUP.
Inventors
- 👤 Harke Jan Houtman
- 👤 Cornelis Johannes Schoot
- 👤 Leendert Klass Hellinga V Beek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/62; E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; E04D; E04D3/00; E04D3/24; E04D3/30; E04D3/38
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |