US2490533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digester control
Assignee: MASON NEILAN REGULATOR Co
•
Filing: 1947-04-25
•
Granted: 1949-12-06
•
Expires: 1967-04-25
Abstract
No abstract record available.
Inventors
- 👤 James M Mcalear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:48
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86324
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911145A
Cited
US2336646A
Cited
US2251246A
Cited
US2310415A
Cited
US2411986A
Cited
US2395357A
Cited
US2451073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |