US3049525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polydivinylbenzene
Assignee: WR Grace and Co
•
Filing: 1959-06-25
•
Granted: 1962-08-14
•
Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Calvin J Benning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:30
CPC Classifications
C; C08; C08F; C08F112/00; C08F112/34; C08F112/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
THE PROCESS OF PREPARING POLYDIVINYLBENZENE COMPRISING CONTACTING DIVINYLBENZENE WITH A CATALYST CONSISTING ESSENTIALLY OF TICL3 IN AN INERT HYDROCARBON SOLVENT AT A TEMPERTURE IN THE RANGE OF 25-100*C.
Claim 2
Dependent Claim
28 words
THE PROCESS OF PREPARING POLYDIVINYLBENZENE COMPRISING CONTACTING DIVINYLBENZENE WITH A CATALYST CONSISTING ESSENTIALLY OF TICL3 IN AN INERT HYDROCARBON SOLVENT AT A TEMPERTURE IN THE RANGE OF 25-100*C.
References Cited (Backward Citations)
US1811078A
Cited
US2970133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |