Patent US3869020A successfully refreshed from Google Patents.
Patent US3490376A successfully refreshed from Google Patents.
US3490376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well point system
Assignee: Individual
•
Filing: 1968-12-30
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Granted: 1970-01-20
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Expires: 1988-12-30
Abstract
No abstract record available.
Inventors
- 👤 Joe M Valdespino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:58
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/14; F04F5/24; E; E02; E02D; E02D19/00; E02D19/06; E02D19/10; F04D; F04D9/00; F04D9/04; F04D9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2651259A
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US2654434A
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US2674189A
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US2798435A
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US2786651A
Cited
US3010232A
Cited
US3013665A
Cited
US3342135A
Cited
US3420181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |