Patent US1904473A successfully refreshed from Google Patents.
US1904473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam boiler
Assignee: Fuller Lehigh Co
•
Filing: 1928-08-23
•
Granted: 1933-04-18
•
Expires: 1948-08-23
Abstract
No abstract record available.
Inventors
- 👤 Howard J Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:40
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-04-17 | 1936-10-17 | 1937-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-17 | 1940-10-17 | 1941-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-17 | 1944-10-17 | 1945-04-18 | $7700.00 | Window Closed / Lapsed |