US2847192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube supporting and spacing structure for heat exchangers
Assignee: Acme Industries Inc
•
Filing: 1955-09-12
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Granted: 1958-08-12
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Smith Lewis Raymond
- 👤 Mclean A Ambrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/08; F28D7/082; F28D7/085; F28F; F28F21/00; F28F21/06; F28F21/067; F28F9/00; F28F9/007; F28F9/013; F28F9/0132; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/417; Y10S165/419
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1633975A
Cited
US2143157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |