US3434743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well apparatus
Assignee: FMC Corp
•
Filing: 1966-07-07
•
Granted: 1969-03-25
•
Expires: 1986-07-07
Abstract
No abstract record available.
Inventors
- 👤 Roy A Boeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:01
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/93; Y10S411/999
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2746773A
Cited
US2709091A
Cited
US2798747A
Cited
US2848255A
Cited
US2935343A
Cited
US3072420A
Cited
US3166345A
Cited
US3221794A
Cited
US3339832A
Cited
US3343581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |