US3527296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable safety shut-off for well bores or other openings
Assignee: Lynes Inc
•
Filing: 1968-09-20
•
Granted: 1970-09-08
•
Expires: 1988-09-20
Abstract
No abstract record available.
Inventors
- 👤 Billy C Malone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:29
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B33/1272
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1850218A
Cited
US2186230A
Cited
US2390372A
Cited
US2994378A
Cited
US2991833A
Cited
US2942669A
Cited
US3221818A
Cited
US3259192A
Cited
US3305021A
Cited
US3427651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |