US2742896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burning hot air generator
Assignee: REKUPERATOR K G DR ING SCHACK AND CO
•
Filing: 1951-01-02
•
Granted: 1956-04-24
•
Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Schack Gunther
- 👤 Wellensiek Gert
- 👤 Schefels Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:39
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/088
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US566450A
Cited
US2047121A
Cited
US727391A
Cited
US1144469A
Cited
FR641271A
Cited
DE717858C
Cited
US2286665A
Cited
US2462395A
Cited
US2600020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |