US3284375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy containing condensation products and method of making same
Assignee: Shell USA Inc
•
Filing: 1954-09-03
•
Granted: 1966-11-08
•
Expires: 1974-09-03
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08G63/00; C08G63/66; C08G63/668; C08G63/676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A POLYEPOXIDE COMPRISING A CONDENSATION POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYAMIDES, EACH MEMBER OF SAID GROUP HAVING A MAIN POLYMER CHAIN CONTAINING, IN ADDITION TO CARBON, A DISSIMILAR ELEMENT OF THE GROUP CONSISTING OF OXYGEN, NITROGEN, SULFUR, PHOSPHOROUS AND SILICON IN AT LEAST TWO DIFFERENT LOCATIONS IN THE CHAIN, EACH OF THE POLYESTERS AND POLYAMIDES CONTAINING AT LEAST TWO INTERNAL 2,3-OXIRANYLENE GROUPS AND SAID 2,3-OXIRANYLENE GROUP BEING LOCATED AT THE FORMER SITE OF CARBON-TO-CARBON UNSATURATED LINKAGES IN THE CONDENSATION POLYMER.
Claim 2
Dependent Claim
84 words
A POLYEPOXIDE COMPRISING A CONDENSATION POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYAMIDES, EACH MEMBER OF SAID GROUP HAVING A MAIN POLYMER CHAIN CONTAINING, IN ADDITION TO CARBON, A DISSIMILAR ELEMENT OF THE GROUP CONSISTING OF OXYGEN, NITROGEN, SULFUR, PHOSPHOROUS AND SILICON IN AT LEAST TWO DIFFERENT LOCATIONS IN THE CHAIN, EACH OF THE POLYESTERS AND POLYAMIDES CONTAINING AT LEAST TWO INTERNAL 2,3-OXIRANYLENE GROUPS AND SAID 2,3-OXIRANYLENE GROUP BEING LOCATED AT THE FORMER SITE OF CARBON-TO-CARBON UNSATURATED LINKAGES IN THE CONDENSATION POLYMER.
References Cited (Backward Citations)
US2581464A
Cited
US2671771A
Cited
US2566206A
Cited
US2660563A
Cited
US2731429A
Cited
US2682514A
Cited
US2720500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |