US2989701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring equipment
Assignee: Hagan Chemicals and Controls Inc
•
Filing: 1957-11-26
•
Granted: 1961-06-20
•
Expires: 1977-11-26
Abstract
No abstract record available.
Inventors
- 👤 Gill Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:28
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/024; G01R; G01R15/00; G01R15/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2413389A
Cited
US2403521A
Cited
US2459730A
Cited
GB681214A
Cited
US2648015A
Cited
US2736861A
Cited
US2802181A
Cited
US2824286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |