US2398043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring retained closure plug
Assignee: Superheater Co Ltd
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Filing: 1944-09-07
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Granted: 1946-04-09
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Expires: 1964-09-07
Abstract
No abstract record available.
Inventors
- 👤 Sarafin Boris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:29
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16J13/10; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/132; F28; F28F; F28F11/00; F28F11/02; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/974; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-08 | 1949-10-08 | 1950-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-08 | 1953-10-08 | 1954-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-08 | 1957-10-08 | 1958-04-09 | $7700.00 | Window Closed / Lapsed |