US2557094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isobutylene-rho-chloro-styrene-styrene tripolymer
Assignee: Standard Oil Development Co
•
Filing: 1945-09-29
•
Granted: 1951-06-19
•
Expires: 1965-09-29
Abstract
No abstract record available.
Inventors
- 👤 John D Garber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A TRIPOLYMER OF 50% BY WEIGHT OF ISOBUTYLENE, 25% OF P-CHLOROSTYRENE AND 25% OF STYRENE, SAID TRIPOLYMER HAVING AN INTRINSIC VISCOSITY OF 0.70.
Claim 2
Dependent Claim
23 words
A TRIPOLYMER OF 50% BY WEIGHT OF ISOBUTYLENE, 25% OF P-CHLOROSTYRENE AND 25% OF STYRENE, SAID TRIPOLYMER HAVING AN INTRINSIC VISCOSITY OF 0.70.
References Cited (Backward Citations)
US1890772A
Cited
US2066330A
Cited
GB513521A
Cited
GB564829A
Cited
US2368538A
Cited
US2406319A
Cited
US2398736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |