US3456682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve disc
Assignee: Durable Manufacturing Co
•
Filing: 1966-11-21
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Granted: 1969-07-22
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Blackford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:51
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/141; F16K15/02; F16K15/08; F16K15/10; F16K31/00; F16K31/02; F16K31/06; F16K31/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7861; Y10T137/7862; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7918
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |