US2879975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling water circulating apparatus
Assignee: Individual
•
Filing: 1956-08-20
•
Granted: 1959-03-31
•
Expires: 1976-08-20
Abstract
No abstract record available.
Inventors
- 👤 Doi Midori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:44
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/005; F24; F24T; F24T10/00; Y; Y02; Y02E; Y02E10/00; Y02E10/10; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/742
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |