Patent US3477512A successfully refreshed from Google Patents.
US3477512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well fracturing method using wax emulsions
Assignee: Wyeth Holdings LLC
•
Filing: 1967-12-15
•
Granted: 1969-11-11
•
Expires: 1987-12-15
Abstract
No abstract record available.
Inventors
- 👤 Frederick Herman Siegele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:02
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/92
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1440356A
Cited
US1625672A
Cited
US2007218A
Cited
US3046222A
Cited
US3259190A
Cited
US3108441A
Cited
US3266915A
Cited
US3316965A
Cited
US3237693A
Cited
US3302719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |