Patent US1738530A successfully refreshed from Google Patents.
US1738530A
Expired / Lapsed
US
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Preparation of photosensitive photographic emulsions
Assignee: GAF Chemicals Corp
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Filing: 1928-08-11
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Granted: 1929-12-10
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Expires: 1948-08-11
Abstract
No abstract record available.
Inventors
- 👤 Frankenburger Walter
- 👤 Roessler Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/725; G03C1/7256
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) | 1932-12-09 | 1933-06-10 | 1933-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-12-09 | 1937-06-10 | 1937-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-12-09 | 1941-06-10 | 1941-12-10 | $7700.00 | Window Closed / Lapsed |