US2835329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced packer
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-06-23
•
Granted: 1958-05-20
•
Expires: 1975-06-23
Abstract
No abstract record available.
Inventors
- 👤 Martin E True
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:41
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/127; E21B33/1277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US820149A
Cited
US1502372A
Cited
US2133462A
Cited
US2236512A
Cited
US2449514A
Cited
US2643722A
Cited
US2723721A
Cited
US2778432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |