US3295599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer fin heat exchanging tube
Assignee: NIHON GENSHIRYOKU KENKYUJO
•
Filing: 1963-04-05
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Granted: 1967-01-03
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Okamoto Yoshizo
- 👤 Negoya Shinichi
- 👤 Namatame Ken
- 👤 Ohuchi Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:54
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/08; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/16; F28F1/34; F28F1/36; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE540374A
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US2267027A
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US2553142A
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US2667337A
Cited
US2613066A
Cited
US2690060A
Cited
GB820772A
Cited
US2984611A
Cited
US2976128A
Cited
US3100930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |