Patent US2489339A successfully refreshed from Google Patents.
US2489339A
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US
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Fluid pressure medium dispensing means
Assignee: Specialties Development Corp
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Filing: 1944-12-02
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Granted: 1949-11-29
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Expires: 1964-12-02
Abstract
No abstract record available.
Inventors
- 👤 John H Stroop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/02; A; A62; A62C; A62C13/00; A62C13/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR384755A
Cited
US939069A
Cited
US1110958A
Cited
US1094761A
Cited
US1826975A
Cited
US1894732A
Cited
US2050032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |