US2627306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic heater
Assignee: Individual
•
Filing: 1949-04-15
•
Granted: 1953-02-03
•
Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Donald M Stadd
- 👤 Schreiber Raymond Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F7/034; F; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0057; F23D2206/0063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US912879A
Cited
US1347631A
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US1266162A
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US1353314A
Cited
GB153213A
Cited
US1502251A
Cited
US1753897A
Cited
FR693002A
Cited
GB399642A
Cited
DE630104C
Cited
US2042690A
Cited
US2579620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |