US3407615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature heat exchanger
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
•
Filing: 1966-09-14
•
Granted: 1968-10-29
•
Expires: 1986-09-14
Abstract
No abstract record available.
Inventors
- 👤 Klipping Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/057; F25; F25D; F25D3/00; F25D3/10; F28; F28F; F28F1/00; F28F1/10; F28F1/40; F28F13/00; F28F13/06; Y; Y10; Y10S; Y10S165/00; Y10S165/907
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |