US3023994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge block, valve gate assembly
Assignee: Shaffer Tool Works
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Filing: 1954-04-26
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Granted: 1962-03-06
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Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wilfred C Gibson
- 👤 Jr Frank J Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062; F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18
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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |