US3467179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating heating device
Assignee: Individual
•
Filing: 1965-11-26
•
Granted: 1969-09-16
•
Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Petr Isaakovich Tevis
- 👤 Vladimir Nikolaevic Kostochkin
- 👤 Vladimir Alexandrovich Ananev
- 👤 Viktor Mikhailovich Krjukov
- 👤 Dmitry Mikhailovich Mitin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:56
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; C; C21; C21D; C21D1/00; C21D1/74; C21D1/767; F04D29/00; F04D29/58; F04D29/582; F26; F26B; F26B21/00; F26B21/20; F26B21/25; F26B21/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1757239A
Cited
US2143100A
Cited
US2683448A
Cited
GB848131A
Cited
US3010187A
Cited
US3219027A
Cited
US3297019A
Cited
US3320406A
Cited
US3252258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |