US2638731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Milliken Research Corp
•
Filing: 1948-05-01
•
Granted: 1953-05-19
•
Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 Norman E Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/32; D01H5/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1851090A
Cited
GB315108A
Cited
US1980146A
Cited
US2061011A
Cited
GB486806A
Cited
GB493974A
Cited
US2471834A
Cited
US2451953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |