Patent US3470957A successfully refreshed from Google Patents.
US3470957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well sealing with atomized resin
Assignee: Big Three Industrial Gas and Equipment Co
•
Filing: 1967-03-10
•
Granted: 1969-10-07
•
Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 Billy E Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2265923A
Cited
US2808886A
Cited
US2815815A
Cited
US3087544A
Cited
US3096819A
Cited
US3141503A
Cited
US3100528A
Cited
US3299953A
Cited
US3330350A
Cited
US3373813A
Cited
US3373812A
Cited
US3367417A
Cited
US3364994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |