US2618846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of plating tube sheets
Assignee: Lummus Technology LLC
•
Filing: 1947-08-15
•
Granted: 1952-11-25
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 Layne H Morris
- 👤 Ralph W Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
C; C23; C23C; C23C26/00; C23C26/02; Y; Y10; Y10S; Y10S72/00; Y10S72/70; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49364; Y10T29/4981; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044897A
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US2076207A
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US2191470A
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US2299778A
Cited
US2216702A
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US2277654A
Cited
US2390343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |