Patent US2211958A successfully refreshed from Google Patents.
US2211958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reservoir
Assignee: Individual
•
Filing: 1939-01-12
•
Granted: 1940-08-20
•
Expires: 1959-01-12
Abstract
No abstract record available.
Inventors
- 👤 Mahaffey Birch Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/041; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/402; Y10T137/6851; Y10T137/6966; Y10T137/8593; Y10T137/86187; Y10T137/86228; Y10T137/86292; Y10T137/86324
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-08-20 | 1944-02-19 | 1944-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-20 | 1948-02-19 | 1948-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-20 | 1952-02-19 | 1952-08-20 | $7700.00 | Window Closed / Lapsed |