Patent US2810397A successfully refreshed from Google Patents.
US2810397A
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Nylon pump valve with spring retainer
Assignee: LINE SCALE Co Inc
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Filing: 1955-11-17
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Granted: 1957-10-22
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Expires: 1975-11-17
Abstract
No abstract record available.
Inventors
- 👤 Wallace F Olson
- 👤 William L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:03
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/108; F04B53/102; F04B53/103; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/793; Y10T137/7935
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |