US2822774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Grotnes Machine Works Inc
•
Filing: 1955-01-11
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Granted: 1958-02-11
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Expires: 1975-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles M Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:55
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/30; B21D51/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1951405A
Cited
US2088054A
Cited
US2539906A
Cited
US1827544A
Cited
US2017495A
Cited
US2209851A
Cited
US2705432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |