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US2476544A
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Antistain agents for silver bleach solutions
Assignee: GAF Chemicals Corp
•
Filing: 1944-11-17
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Granted: 1949-07-19
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Expires: 1964-11-17
Abstract
No abstract record available.
Inventors
- 👤 Harold C Harsh
- 👤 James E Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:26
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C7/421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB261201A
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US1939026A
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US1969479A
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US2018195A
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US2331492A
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US2378265A
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US2356477A
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US2367548A
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US2356486A
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US2384658A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |