US2553091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: Individual
•
Filing: 1948-09-11
•
Granted: 1951-05-15
•
Expires: 1968-09-11
Abstract
No abstract record available.
Inventors
- 👤 Harold R Horning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:21
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110209A
Cited
US2072731A
Cited
US2225775A
Cited
US2418097A
Cited
GB588086A
Cited
US2475911A
Cited
US2488911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |