US2587747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure chamber liquid control unit
Assignee: Individual
•
Filing: 1949-01-08
•
Granted: 1952-03-04
•
Expires: 1969-01-08
Abstract
No abstract record available.
Inventors
- 👤 Paul J Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:08
CPC Classifications
F; F22; F22D; F22D5/00; F22D5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20380E
Cited
US1997121A
Cited
US1917742A
Cited
US2145199A
Cited
US2137880A
Cited
US2400849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |