US2985129A
Expired / Lapsed
US
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Apparatus for performing operations in controlled atmosphere
Assignee: Brooks and Perkins Inc
•
Filing: 1957-01-28
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Granted: 1961-05-23
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Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 James S Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
B; B25; B25J; B25J21/00; B25J21/02; A; A41; A41D; A41D13/00; A41D13/002; A41D13/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2693088A
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US2813022A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |