US2844889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means for a roll assembly in the entrance or exit passage of a pressure or vacuum chamber
Assignee: BACHMANN UXBRIDGE WORSTED Corp
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Filing: 1955-05-27
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Granted: 1958-07-29
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Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:26
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/14; D06B23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |