Patent US1970496A successfully refreshed from Google Patents.
US1970496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier provided with a light sensitive substance and process of manufacturing the same
Assignee: Koninklijke Philips NV
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Filing: 1931-01-13
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Granted: 1934-08-14
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Expires: 1951-01-13
Abstract
No abstract record available.
Inventors
- 👤 Boer Jan Hendrik De
- 👤 Dippel Cornelis Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:57
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/496; G03C1/4965; Y; Y10; Y10S; Y10S430/00; Y10S430/133; Y10S430/136
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) | 1937-08-13 | 1938-02-12 | 1938-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-13 | 1942-02-12 | 1942-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-13 | 1946-02-12 | 1946-08-14 | $7700.00 | Window Closed / Lapsed |