Patent US3686133A successfully refreshed from Google Patents.
US3686133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersing composition
Assignee: Kao Corp
•
Filing: 1970-05-15
•
Granted: 1972-08-22
•
Expires: 1990-05-15
Abstract
Abstract A COMPOSITION OF MATTER, USEFUL AS A CEMENT DISPERSING AGENT, CONSISTS ESSENTIALLY OF (A) A SALT OF A HIGH MOLECULAR CONDENSATION PRODUCT OF NAPHTHALENSULFONIC ACID AND FORMALDEHYDE, CONTAINING NOT MORE THAN 8 WEIGHT PERCENT OF UNREACTED NAPHTHALENESULFONIC ACID AND NOT LESS THAN 70 WEIGHT PERCENT OF HIGH MOLECULAR WEIGHT CONDENSATES HAVING MORE THAN FIVE NAPHTHALENE NUCLEI, AND (B) A SALT OF GLUCONIC ACID. THE CEMENT DISPERSING AGENT IS MIXED WITH A HYDRAULIC CEMENT COMPOSITION IN ORDER TO FORM CEMENT PASTE, MORTAR, CONCRETE OR THE LIKE.
Inventors
- 👤 Kenichi Hattori
- 👤 Tyoji Yamakawa
- 👤 Akitoshi Tuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:11
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0237; C04; C04B; C04B28/00; C04B28/02; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |