US3139416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of novel polymeric compounds
Assignee: Polysar Ltd
•
Filing: 1961-06-05
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Granted: 1964-06-30
•
Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Lumb Peter Brian
- 👤 Nikolov Nikolai Stoyanov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE PROCESS OF PRODUCING POLYMER CHAINS HAVING TERMINAL HYDROXYL UNITS WHICH COMPRISES TERMINATING THE ACTIVE POLYMER PRODUCED BY ANIONIC POLYMERIZATION OF A VINYL AROMATIC COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
29 words
THE PROCESS OF PRODUCING POLYMER CHAINS HAVING TERMINAL HYDROXYL UNITS WHICH COMPRISES TERMINATING THE ACTIVE POLYMER PRODUCED BY ANIONIC POLYMERIZATION OF A VINYL AROMATIC COMPOUND REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
CA620326A
Cited
US2835658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |