Patent US3322296A successfully refreshed from Google Patents.
Patent US2267905A successfully refreshed from Google Patents.
US2267905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Individual
•
Filing: 1939-12-04
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Granted: 1941-12-30
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Expires: 1959-12-04
Abstract
No abstract record available.
Inventors
- 👤 Frantz Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:46
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105; F28D; F28D9/00; F28D9/0031; F28D9/0037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-12-29 | 1945-06-30 | 1945-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-29 | 1949-06-30 | 1949-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-29 | 1953-06-30 | 1953-12-30 | $7700.00 | Window Closed / Lapsed |