Patent US3661870A successfully refreshed from Google Patents.
US3661870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isobutylene,1,3-butadiene,methyl butene copolymers
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1969-11-24
•
Granted: 1972-05-09
•
Expires: 1989-11-24
Abstract
Abstract A RESINOUS MATERIAL, TYPICALLY ESSENTIALLY NONCYCLIC, USEFUL AS A TACKIFIER, AND HAVING A SOFTENING POINT IN THE RANGE OF FROM ABOUT 20*C. TO ABOUT 40*C., WHICH COMPRISES FROM ABOUT 25 TO 75 WEIGHT PERCENT UNITS DERIVED FROM ISOBUTYLENE, FROM ABOUT 5 TO ABOUT 50 WEIGHT PERCENT UNITS DERIVED FROM 1,3-BUTADIENE, FROM ABOUT 5 TO ABOUT 50 WEIGHT PERCENT UNITS DERIVED FROM 2-METHYL-1-BUTENE, AND UP TO ABOUT 10 WEIGHT PERCENT UNITS DERIVED FROM 3-METHYL-1-BUTENE, WHEREIN THE RATIO OF THE UNITS DERIVED FROM ISOBUTYLENE TO UNITS DERIVED FROM 1,3-BUTADIENE IS FROM ABOUT 1:1 TO ABOUT 5:1.
Inventors
- 👤 Herbert L Bullard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:17
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C08; C08F; C08F10/00; C08L; C08L2666/00; C08L2666/02; C08L2666/04
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |