US2472335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flameproofing combustible cellulosic material
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1945-11-15
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Granted: 1949-06-07
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Expires: 1965-11-15
Abstract
No abstract record available.
Inventors
- 👤 Mclean Andrew
- 👤 Marrian Stanley Frederic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:16
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/61; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2689
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |