Patent US3548860A successfully refreshed from Google Patents.
US3548860A
Expired / Lapsed
US
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Self-draining valve for fluid distribution systems
Assignee: Pacific Pipe Co
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Filing: 1968-09-05
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Granted: 1970-12-22
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Expires: 1988-09-05
Abstract
No abstract record available.
Inventors
- 👤 Ellis H Jacobs
- 👤 Ronald G Billyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:33
CPC Classifications
E; E03; E03B; E03B9/00; E03B9/02; E03B9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/5327; Y10T137/5427; Y10T137/5497; Y10T137/5503; Y10T137/5532; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7889; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702; Y10T137/87169; Y10T137/87233; Y10T137/87241
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |