US2553142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making heat exchangers
Assignee: Johns Manville Corp
•
Filing: 1947-05-29
•
Granted: 1951-05-15
•
Expires: 1967-05-29
Abstract
No abstract record available.
Inventors
- 👤 Mccreary Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:32
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1027917A
Cited
GB331392A
Cited
US1884964A
Cited
US1932610A
Cited
GB452231A
Cited
US2109921A
Cited
US2251642A
Cited
US2251074A
Cited
US2378646A
Cited
US2402262A
Cited
US2423177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |