US2771194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of filtering
Assignee: Baxter Filtration Corp
•
Filing: 1953-09-14
•
Granted: 1956-11-20
•
Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Baxter
- 👤 Alexander A Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:36
CPC Classifications
B; B01; B01D; B01D29/00; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US430120A
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US839772A
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US1271925A
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US1282280A
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US1987142A
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US2401039A
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US2564174A
Cited
GB680391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |