Patent US1601465A successfully refreshed from Google Patents.
US1601465A
Expired / Lapsed
US
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Trickling-filter floor construction
Assignee: METROPOLITAN PAVING BRICK Co
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Filing: 1925-05-15
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Granted: 1926-09-28
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Expires: 1945-05-15
Abstract
No abstract record available.
Inventors
- 👤 James G Barbour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:52
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1929-09-27 | 1930-03-29 | 1930-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-09-27 | 1934-03-29 | 1934-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-09-27 | 1938-03-29 | 1938-09-28 | $7700.00 | Window Closed / Lapsed |