Patent US2441559A successfully refreshed from Google Patents.
US2441559A
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US
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Luminescent coated articles
Assignee: Heyden Chemical Corp
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Filing: 1943-12-01
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Granted: 1948-05-18
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Expires: 1963-12-01
Abstract
No abstract record available.
Inventors
- 👤 Burrell Harry
- 👤 Christy J Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1511874A
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US1700546A
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US2039734A
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US2037793A
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US2108503A
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US2180508A
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US2152856A
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US2297048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |