Patent US3405944A successfully refreshed from Google Patents.
Patent US3702771A successfully refreshed from Google Patents.
US3702771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard pitch binders
Assignee: Qo Chemicals Inc
•
Filing: 1970-08-20
•
Granted: 1972-11-14
•
Expires: 1990-08-20
Abstract
Abstract THIS INVENTION PROVIDES A NOVEL ACID CURED FURAN BASED BINDER WHICH IS A LIQUID AT 25*C., WHICH IS USEFUL FOR BINDING SUSTANTIALLY NON-ALKALINE AGGREGATE SUCH AS CARBON AND GRAPHITE, AND WHICH IS CURED AT ROOM TEMPERATURE TO A THERMOSET CONDITION. THE HARD PITCH BINDER COMPRISES 50 TO 75 PERCENT BY WEIGHT HARD PITCH WITH A SOFTENING POINT BETWEEN PLASTICIER WHICH COMPRISES FURFURYL ALCOHOL; FURFURAL; AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXANONE, MESITYL OXIDE, AND MIXTURE THEREOF.
Inventors
- 👤 Lloyd H Brown
- 👤 David D Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:08
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/026; C04; C04B; C04B35/00; C04B35/01; C04B35/013; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/15; C08K5/151; C08K5/1535
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |