Patent US2216979A successfully refreshed from Google Patents.
US2216979A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1939-11-15
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Granted: 1940-10-08
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Expires: 1959-11-15
Abstract
No abstract record available.
Inventors
- 👤 Willis R Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/14; F; F16; F16B; F16B2200/00; F16B2200/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |