US3231252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for guiding gas through liquid
Assignee: Zinklahoma Inc
•
Filing: 1962-05-11
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Granted: 1966-01-25
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert D Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:06
CPC Classifications
F; F17; F17D; F17D3/00; F17D3/14; F17D3/145; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US839320A
Cited
US829375A
Cited
US1098190A
Cited
US1236581A
Cited
GB187999A
Cited
US1552866A
Cited
FR1227847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |