US2921437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material working apparatus
Assignee: Babcock and Wilcox Co
•
Filing: 1954-06-16
•
Granted: 1960-01-19
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Svenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/046; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/261; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20576; F15B2211/70; F15B2211/75; F15B2211/77; F15B2211/7725; Y; Y10; Y10S; Y10S285/00; Y10S285/919
Claims Analysis
Total Claims: 0
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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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |