US2551312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter bag and system
Assignee: Individual
•
Filing: 1947-09-13
•
Granted: 1951-05-01
•
Expires: 1967-09-13
Abstract
No abstract record available.
Inventors
- 👤 Tony O Bokich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:00
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/39; B01D29/50; B01D29/52; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44983
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1753458A
Cited
US1693717A
Cited
US1738114A
Cited
US1881086A
Cited
US2003720A
Cited
US2347177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |