US3345401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyesters and resulting products
Assignee: Shell USA Inc
•
Filing: 1964-10-19
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Granted: 1967-10-03
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Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Clayton A May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C08G63/46; C08G63/47; C08G63/68; C08G63/682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A ONE-STEP PRCESS FOR PREPARING ACETONE-SOLUBLE HYDROXY-SUBSTITUTED POLYESTER WHICH COMPRISES HEATING AT A TEMPERATURE BETWEEN 40*C. AND 120*C. A MIXTURE COMPRISING A POLYHYDRIC PHENOL WHICH CONTAINS NO FUNCTIONAL GROUPS OTHER THAN THE PHENOLIC OH GROU, A HALOEPOXY-ALKANE HAVING THE EPOXY
Claim 2
Dependent Claim
40 words
A ONE-STEP PRCESS FOR PREPARING ACETONE-SOLUBLE HYDROXY-SUBSTITUTED POLYESTER WHICH COMPRISES HEATING AT A TEMPERATURE BETWEEN 40*C. AND 120*C. A MIXTURE COMPRISING A POLYHYDRIC PHENOL WHICH CONTAINS NO FUNCTIONAL GROUPS OTHER THAN THE PHENOLIC OH GROU, A HALOEPOXY-ALKANE HAVING THE EPOXY
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |