US1704152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil saver
Assignee: Individual
•
Filing: 1927-10-18
•
Granted: 1929-03-05
•
Expires: 1947-10-18
Abstract
No abstract record available.
Inventors
- 👤 Frank M Stephens
- 👤 Arthur P Danaher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; E21B34/00; E21B34/02
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) | 1932-03-04 | 1932-09-03 | 1933-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-03-04 | 1936-09-03 | 1937-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-03-04 | 1940-09-03 | 1941-03-05 | $7700.00 | Window Closed / Lapsed |