Patent US2597467A successfully refreshed from Google Patents.
US2597467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of synthetic resins
Assignee: Celanese Corp
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Filing: 1948-07-03
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Granted: 1952-05-20
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Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Fisher James Wotherspoon
- 👤 Wheatley Edward William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:17
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRODUCTION OFG SYNTHETIC RESINS, WHICH COMPRISES HEATING A MIXTURE OF AT MOST THREE REACTIONS, EACH OF WHICH CAN UNDERGO REACTION WITH ONE OF THE OTHERS,OF WHICH ONE MUST BE FORMALDEHYDE AND ANOTHER MUST BE A HYDRAZIDE OF AN ACID CONTAINING TWO CARBOXYL GROUPS AS THE ONLY NON-HYDROCARBON SUBSTITUENT GROUPS, BOTH CARBOXYL GROUPS BEING COMBINED WITH HYDRAZINE, AND THE THIRD BEING A COMPOUND CAPABLE OF FORMING A RESINOUS PRODUCT BY CONDENSATION WITH FORMALDEHYDE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRODUCTION OFG SYNTHETIC RESINS, WHICH COMPRISES HEATING A MIXTURE OF AT MOST THREE REACTIONS, EACH OF WHICH CAN UNDERGO REACTION WITH ONE OF THE OTHERS,OF WHICH ONE MUST BE FORMALDEHYDE AND ANOTHER MUST BE A HYDRAZIDE OF AN ACID CONTAINING TWO CARBOXYL GROUPS AS THE ONLY NON-HYDROCARBON SUBSTITUENT GROUPS, BOTH CARBOXYL GROUPS BEING COMBINED WITH HYDRAZINE, AND THE THIRD BEING A COMPOUND CAPABLE OF FORMING A RESINOUS PRODUCT BY CONDENSATION WITH FORMALDEHYDE.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |