US2554748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water filter
Assignee: BROADBENT JOHNSTON Inc
•
Filing: 1946-06-28
•
Granted: 1951-05-29
•
Expires: 1966-06-28
Abstract
No abstract record available.
Inventors
- 👤 Howard B Lewis
- 👤 Glen M Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:39
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/005; B01D27/02; B01D27/04; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/56; B01D29/58; B01D29/62; B01D29/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632570A
Cited
US1405406A
Cited
US2103434A
Cited
US2250299A
Cited
GB501176A
Cited
US2212647A
Cited
US2369857A
Cited
US2347384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |