Patent US2673107A successfully refreshed from Google Patents.
US2673107A
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US
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Safety cover for extractor cylinders
Assignee: Individual
•
Filing: 1950-07-28
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Granted: 1954-03-23
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Expires: 1970-07-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Cornelison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:01
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/02; D06F37/12; D06F37/18; D06F49/00; D06F49/003; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1216972A
Cited
CH123986A
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US1637279A
Cited
US1818608A
Cited
US1810019A
Cited
US2171876A
Cited
US2299065A
Cited
US2325808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |