US3366246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafiltration apparatus
Assignee: NAT INSTR LAB Inc
•
Filing: 1965-09-01
•
Granted: 1968-01-30
•
Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Goldsmith Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:39
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/06; B01D63/062; B01D63/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1840079A
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US2187514A
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US2502614A
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US2598818A
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US2609059A
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US2650709A
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US2571210A
Cited
CH309913A
Cited
US2824620A
Cited
US3246764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |