Patent GB987301A successfully refreshed from Google Patents.
US3542059A
Expired / Lapsed
US
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Drainage valve
Assignee: JAY L BLANCHARD
•
Filing: 1968-10-01
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Granted: 1970-11-24
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Expires: 1988-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jay L Blanchard
- 👤 Beymon Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:31
CPC Classifications
E; E04; E04H; E04H13/00; F; F16; F16L; F16L55/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7293; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/794; Y10T137/8122
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) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |