US2396712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter structure and method of making it
Assignee: Akzo Nobel UK PLC
•
Filing: 1942-08-15
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Granted: 1946-03-19
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Expires: 1962-08-15
Abstract
No abstract record available.
Inventors
- 👤 William G Luttge
- 👤 Emmanuel G Mesthene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:41
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D27/00; B01D27/005; B01D27/02; B01D27/04; B01D27/06; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/069; B01D2239/0695; B01D2239/10; Y; Y10; Y10S; Y10S264/00; Y10S264/71; Y10S55/00; Y10S55/05; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/24231; Y10T428/2424; Y10T428/24248; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2933; Y10T428/294; Y10T428/2942
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) | 1949-03-18 | 1949-09-17 | 1950-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-18 | 1953-09-17 | 1954-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-18 | 1957-09-17 | 1958-03-19 | $7700.00 | Window Closed / Lapsed |