US3056459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well screen points
Assignee: EDWARD E JOHNSON Inc
•
Filing: 1959-03-23
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Granted: 1962-10-02
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Howard O Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/12; E21B43/00; E21B43/02; E21B43/08; E21B43/088; E21B7/00; E21B7/18; E21B7/20; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |