US3469609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making well screen
Assignee: Howard Smith Co
•
Filing: 1967-07-11
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Granted: 1969-09-30
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Expires: 1987-07-11
Abstract
No abstract record available.
Inventors
- 👤 Howard F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
B; B21; B21F; B21F27/00; B21F27/12; B23; B23K; B23K11/00; B23K11/08; B23K11/082; B23K11/084; E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/088
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |