US2655905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam purifier
Assignee: SPRINGFIELD BOILER Co
•
Filing: 1950-08-26
•
Granted: 1953-10-20
•
Expires: 1970-08-26
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Rehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:24
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1744314A
Cited
US2058239A
Cited
US2075059A
Cited
US2055781A
Cited
US2256115A
Cited
US2472101A
Cited
US2424212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |