Patent US2919670A successfully refreshed from Google Patents.
US2919670A
Expired / Lapsed
US
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Self-sealing one-way drain valve
Assignee: Martin Co
•
Filing: 1955-11-03
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Granted: 1960-01-05
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr James B Clark
- 👤 Michael M Behles
- 👤 Jr Donald K Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
B; B63; B63B; B63B29/00; B63B29/16; B63J; B63J4/00; B63J4/006; F; F16; F16K; F16K1/00; F16K1/14; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/22; B63B13/00; B63B2013/005; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909
Claims Analysis
Total Claims: 0
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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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |