Patent US2436216A successfully refreshed from Google Patents.
US2436216A
Expired / Lapsed
US
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Flameproofing compositions
Assignee: Individual
•
Filing: 1942-12-28
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Granted: 1948-02-17
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Expires: 1962-12-28
Abstract
No abstract record available.
Inventors
- 👤 Earl W Leatherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:32
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1975072A
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US2052886A
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US2044176A
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GB444403A
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US2167278A
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US2286744A
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GB505989A
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US2314242A
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US2299612A
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US2378715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |