Patent US3028854A successfully refreshed from Google Patents.
US3028854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater
Assignee: Dravo Corp
•
Filing: 1957-12-30
•
Granted: 1962-04-10
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Bertram B Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:21
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/087
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US616844A
Cited
US1018967A
Cited
US1907049A
Cited
US2172667A
Cited
US1013304A
Cited
US2037070A
Cited
US2404592A
Cited
US2512384A
Cited
US2529574A
Cited
US2715399A
Cited
US2800126A
Cited
US2836169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |