US2808034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow heater
Assignee: Fa Gas- Wasser- und Elektrische Anlagen Swatek & Cerny
•
Filing: 1954-05-25
•
Granted: 1957-10-01
•
Expires: 1974-05-25
Abstract
No abstract record available.
Inventors
- 👤 Cerny Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:51
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/48; F24H1/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1769265A
Cited
US1730293A
Cited
US1908042A
Cited
US1910565A
Cited
US1925398A
Cited
FR753108A
Cited
US2159284A
Cited
US2151108A
Cited
US2189749A
Cited
US2327339A
Cited
US2399985A
Cited
US2592216A
Cited
US2607535A
Cited
US2617392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |