US2604082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler
Assignee: Individual
•
Filing: 1950-05-18
•
Granted: 1952-07-22
•
Expires: 1970-05-18
Abstract
No abstract record available.
Inventors
- 👤 Howard D Coulbourn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:31
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/24; F24H1/26; F24H1/44; G; G04; G04B; G04B39/00; G04B39/02; G04B39/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US406359A
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US484696A
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US532570A
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US592891A
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US1790750A
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US787397A
Cited
US1027389A
Cited
US1835329A
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US1884742A
Cited
US1972324A
Cited
US2160801A
Cited
US2186803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |