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US3527639A
Expired / Lapsed
US
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Light-sensitive composition utilizing anthraquinone derivatives as optical sensitizers
Assignee: Kalle GmbH and Co KG
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Filing: 1966-09-28
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Granted: 1970-09-08
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Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 Roland Moraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |