US2367771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching cellulosic materials
Assignee: Mathieson Alkali Works Inc
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Filing: 1941-10-08
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Granted: 1945-01-23
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Expires: 1961-10-08
Abstract
No abstract record available.
Inventors
- 👤 Hampel Clifford Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:18
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1026; D21C9/1036; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/26; D21C9/12; D21C9/14
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) | 1948-01-23 | 1948-07-24 | 1949-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-01-23 | 1952-07-24 | 1953-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-01-23 | 1956-07-24 | 1957-01-23 | $7700.00 | Window Closed / Lapsed |