US2599956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absolute pressure controlling apparatus
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1946-06-08
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Granted: 1952-06-10
•
Expires: 1966-06-08
Abstract
No abstract record available.
Inventors
- 👤 Charles F Wallace
- 👤 John O Kirwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:14
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0616; G05D16/0625; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR455290A
Cited
US1174661A
Cited
US1172596A
Cited
US1631262A
Cited
FR696896A
Cited
US2115512A
Cited
US2318721A
Cited
US2312063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |