US2875992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor washing apparatus
Assignee: Babcock and Wilcox Co
•
Filing: 1955-10-19
•
Granted: 1959-03-03
•
Expires: 1975-10-19
Abstract
No abstract record available.
Inventors
- 👤 Edward A Pirsh
- 👤 Jr Edwin J Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:05
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US655727A
Cited
US665995A
Cited
GB148811A
Cited
US1780255A
Cited
US1988262A
Cited
US2490080A
Cited
US2661075A
Cited
US2712929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |