Patent US2901443A successfully refreshed from Google Patents.
US2901443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing high molecular compounds
Assignee: Hoechst AG
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Filing: 1956-03-06
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Granted: 1959-08-25
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Starck Werner
- 👤 Starck Hans
- 👤 Schulde Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:05
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/52; C08G59/5046; C08G59/5053; C08G59/506; C08G59/5066; C08G73/00; C08G73/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
IN A PROCESS FOR PREPARING A PLASTIC MATERIAL, THE STEP WHICH COMPRISES REACTING AT A TEMPERATURE WITHIN THE RANGE OF 15 TO 200* C,. ONE TO TEN PARTS OF AN ETHYLENE IMINE ESTER CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
38 words
IN A PROCESS FOR PREPARING A PLASTIC MATERIAL, THE STEP WHICH COMPRISES REACTING AT A TEMPERATURE WITHIN THE RANGE OF 15 TO 200* C,. ONE TO TEN PARTS OF AN ETHYLENE IMINE ESTER CORRESPONDING TO THE GENERAL FORMULA
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |