Patent US3547403A successfully refreshed from Google Patents.
US3547403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valves
Assignee: Fischer and Porter Co
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Filing: 1969-01-10
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Granted: 1970-12-15
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Expires: 1989-01-10
Abstract
No abstract record available.
Inventors
- 👤 Oscar H Grauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:20
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067; F16K5/00; F16K5/06; F16K5/0626; F16K5/0631; F16K5/0657
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |