US3398762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Otis Engineering Corp
•
Filing: 1965-10-21
•
Granted: 1968-08-27
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 John V Fredd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:57
CPC Classifications
F; F16; F16K; F16K5/00; E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; F16K31/00; F16K31/44; F16K31/445; E21B2200/00; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7784; Y10T137/7785
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3189044A
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US3294104A
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US3236255A
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US3310114A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |