US1785277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-well packer
Assignee: Oil Well Supply Co
•
Filing: 1927-07-06
•
Granted: 1930-12-16
•
Expires: 1947-07-06
Abstract
No abstract record available.
Inventors
- 👤 Patrick H Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:26
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291; Y; Y10; Y10S; Y10S285/00; Y10S285/922
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) | 1933-12-15 | 1934-06-16 | 1934-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-12-15 | 1938-06-16 | 1938-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-12-15 | 1942-06-16 | 1942-12-16 | $7700.00 | Window Closed / Lapsed |