Patent US1811029A successfully refreshed from Google Patents.
US1811029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing light-sensitive layers by means of diazo compounds and the products obtainable thereby
Assignee: Kalle GmbH and Co KG
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Filing: 1928-11-30
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Granted: 1931-06-23
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Expires: 1948-11-30
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Maximilian Paul
- 👤 Spietschka Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/54
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) | 1934-06-22 | 1934-12-22 | 1935-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-22 | 1938-12-22 | 1939-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-22 | 1942-12-22 | 1943-06-23 | $7700.00 | Window Closed / Lapsed |