US3242160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic basic salts of sulfonated tall oil pitch
Assignee: Phillips Petroleum Co
•
Filing: 1962-08-23
•
Granted: 1966-03-22
•
Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A DRILLING FLUID ADDITIVE COMPRISING A SOLID ALKALI METAL SULFONATE OF TALL OIL PITCH.
References Cited (Backward Citations)
US1980414A
Cited
US2348200A
Cited
GB369985A
Cited
US2335947A
Cited
US2278170A
Cited
FR906108A
Cited
US2702787A
Cited
US2731415A
Cited
US2844624A
Cited
US3047493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |