US3579445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for the treatment of scale
Assignee: Texaco Inc
•
Filing: 1968-06-24
•
Granted: 1971-05-18
•
Expires: 1988-06-24
Abstract
Abstract METHOD OF AND COMPOSITION FOR THE TREATMENT OF SCALE, PARTICULARLY CALCIUM SULFATE SCALE, USING A QUATERNARY TRIMETHYLALKYL AMMONIUM HALIDE, SULFATE OR HYDROXIDE CONTAINING 8 TO 20 CARBON ATOMS IN THE ALKYL GROUP INCLUDING MIXTURES.
Inventors
- 👤 Jack F Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |