US2940736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Element set for heat exchangers
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1950-05-11
•
Granted: 1960-06-14
•
Expires: 1970-05-11
Abstract
No abstract record available.
Inventors
- 👤 Odman Tor Axel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:07
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/393; Y10S165/394
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US409049A
Cited
US1018156A
Cited
US1106172A
Cited
GB291402A
Cited
US1823481A
Cited
US2023965A
Cited
GB363357A
Cited
US1885294A
Cited
US2064931A
Cited
US2152297A
Cited
US2361039A
Cited
US2302945A
Cited
US2438851A
Cited
US2596642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |