US2979310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: INTERCONTINENTAL Manufacturing Co I
•
Filing: 1956-10-08
•
Granted: 1961-04-11
•
Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/12; F25; F25B; F25B2339/00; F25B2339/04; F25B2339/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49359
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE181721C
Cited
US211615A
Cited
US1551411A
Cited
US1807796A
Cited
US2131265A
Cited
US2251066A
Cited
US2271437A
Cited
US2576213A
Cited
US2577359A
Cited
US2736533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |