Patent US2698729A successfully refreshed from Google Patents.
US2698729A
Expired / Lapsed
US
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Two-way pilot controlled diaphragm valve
Assignee: TRACY S ANSEL
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Filing: 1950-07-10
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Granted: 1955-01-04
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Expires: 1970-07-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas O Cox
- 👤 Homer C Rankin
- 👤 Samuel A Trott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:50
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE30098C
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CH15792A
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US1180603A
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US1474472A
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US1579785A
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US1856889A
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US2180320A
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US2235304A
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US2328008A
Cited
US2524142A
Cited
US2532568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |