US2207733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of wells
Assignee: —
•
Filing: —
•
Granted: 1940-07-16
•
Expires: 1957-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/265; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
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) | 1943-07-16 | 1944-01-15 | 1944-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-16 | 1948-01-15 | 1948-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-16 | 1952-01-15 | 1952-07-16 | $7700.00 | Window Closed / Lapsed |