Patent US2532278A successfully refreshed from Google Patents.
US2532278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydantoin formaldehyde resins
Assignee: EIDP Inc
•
Filing: 1948-04-24
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Granted: 1950-12-05
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Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 Albert F Chadwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:21
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR THE PRODUCTION OF HYDANTOIN FORMALDEHYDE RESINS WHICH COMPRISES BRINGING TOGETHER A HYDANTOIN HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR THE PRODUCTION OF HYDANTOIN FORMALDEHYDE RESINS WHICH COMPRISES BRINGING TOGETHER A HYDANTOIN HAVING THE FORMULA
References Cited (Backward Citations)
US1952598A
Cited
US2192129A
Cited
US2155863A
Cited
GB497124A
Cited
US2338464A
Cited
US2313953A
Cited
FR880185A
Cited
US2388143A
Cited
US2428752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |