US3047994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: NAT REFILL Co Inc
•
Filing: 1959-12-04
•
Granted: 1962-08-07
•
Expires: 1979-12-04
Abstract
No abstract record available.
Inventors
- 👤 Brun George K Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S261/00; Y10S261/41; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1887737A
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US1699899A
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US2057568A
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US2138736A
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US2182501A
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US2685345A
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US2789663A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |