US2821636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Go-devils
Assignee: Individual
•
Filing: 1955-04-18
•
Granted: 1958-01-28
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Jefferson Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553; G; G01; G01V; G01V5/00; G21; G21F; G21F5/00; G21F5/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2648778A
Cited
US2670443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |