Patent US3028370A successfully refreshed from Google Patents.
US3028370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resins
Assignee: Phillips Petroleum Co
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Filing: 1957-09-09
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Granted: 1962-04-03
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Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 Charles E Wheelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:29
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A RESIN PRODUCED BY MAINTAINING AT A TEMPERATURE OF 20 TO 260*C. FOR 1 TO 24 HOURS A MIXTURE OF AN EXPOXIDIZED POLYMER OF BUTADIENE, 8 TO 70 PERCENT OF THE C4 UNITS IN SAID POLYMER SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
42 words
A RESIN PRODUCED BY MAINTAINING AT A TEMPERATURE OF 20 TO 260*C. FOR 1 TO 24 HOURS A MIXTURE OF AN EXPOXIDIZED POLYMER OF BUTADIENE, 8 TO 70 PERCENT OF THE C4 UNITS IN SAID POLYMER SELECTED FROM THE GROUP CONSISTING OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |