US2329052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control mechanism for liquid treating apparatus
Assignee: Individual
•
Filing: 1941-01-09
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Granted: 1943-09-07
•
Expires: 1961-01-09
Abstract
No abstract record available.
Inventors
- 👤 Chester M Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; B; B01; B01J; B01J49/00; B01J49/75; C; C02; C02F; C02F1/00; C02F1/42
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) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |