US2835121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing orifice for steam tubes and the like
Assignee: Dow Chemical Co
•
Filing: 1955-10-26
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Granted: 1958-05-20
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Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Edward M Diss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:15
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/14; D06B23/18; D01; D01D; D01D10/00; D01D10/02; D01D10/04; D01D10/0436; D01D10/0481
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2228260A
Cited
US2371579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |