US1554154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superheater of water-tube boilers
Assignee: Individual
•
Filing: 1920-02-10
•
Granted: 1925-09-15
•
Expires: 1940-02-10
Abstract
No abstract record available.
Inventors
- 👤 Harold E Yarrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:20
CPC Classifications
F; F22; F22G; F22G7/00; F22G7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-09-14 | 1929-03-16 | 1929-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-14 | 1933-03-16 | 1933-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-14 | 1937-03-16 | 1937-09-15 | $7700.00 | Window Closed / Lapsed |