Patent US3682831A successfully refreshed from Google Patents.
US3682831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and composition for the prevention of scale
Assignee: Texaco Inc
•
Filing: 1969-12-16
•
Granted: 1972-08-08
•
Expires: 1989-12-16
Abstract
Abstract METHOD OF AND COMPOSITION FOR THE PREVENTION OF SCALE, PARTICULARLY CALCIUM SULFATE SCALE, USING A WATER SOLUBLE GLYCOL-SILICONE COPOLYMER OF A PRESCRIBED FORMULA HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 458 TO ABOUT 1148.
Inventors
- 👤 Jack F Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:46
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; 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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |