Patent US3575711A successfully refreshed from Google Patents.
Patent US3312679A successfully refreshed from Google Patents.
US3312679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process utilizing peroxydicarbonate ester and aminoaromatic sulfonic acid salt as catalyst
Assignee: PPG Industries Inc
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Filing: 1963-02-01
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Granted: 1967-04-04
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Expires: 1983-02-01
Abstract
No abstract record available.
Inventors
- 👤 John C Crano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A METHOD OF POLYMERIZING ETHYLENICALLY UNSATURATED COMPOUNDS SUSCEPTIBLE TO FREE-RADICAL POLYMERIZATION, WHICH COMPRISES POLYMERIZING SUCH UNSATURATED COMPOUND WITH A CATALYTIC AMOUNT OF (A) A PEROXYDICARBONATE ESTER REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
30 words
A METHOD OF POLYMERIZING ETHYLENICALLY UNSATURATED COMPOUNDS SUSCEPTIBLE TO FREE-RADICAL POLYMERIZATION, WHICH COMPRISES POLYMERIZING SUCH UNSATURATED COMPOUND WITH A CATALYTIC AMOUNT OF (A) A PEROXYDICARBONATE ESTER REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |