US2539920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked polymeric materials and method of making same
Assignee: EIDP Inc
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Filing: 1947-09-16
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Granted: 1951-01-30
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Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Paul W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF INSOLUBILIZING POLYMERIC MATERIALS CONTAINING AT LEAST ONE REACTIVE GROUP SELECTED FROM THE CLASS WHICH CONSISTS OF THIOCYANO ESTERS, HALOGEN ESTERS, SULFATE ESTERS AND SULFONATE ESTERS, WHICH COMPRISES DIRECTLY CROSSLINKING AT A TEMPERATURE OF AT LEAST 50* C. SUCH POLYMERIC MATERIAL WITH ABOUT 5%, BASED ON THE WEIGHT OF SAID POLYMERIC MATERIALS, OF A POLYTHIOURES COMPOUND CONTAINING THE FOLLOWING GROUP:
Claim 2
Independent Claim
62 words
A METHOD OF INSOLUBILIZING POLYMERIC MATERIALS CONTAINING AT LEAST ONE REACTIVE GROUP SELECTED FROM THE CLASS WHICH CONSISTS OF THIOCYANO ESTERS, HALOGEN ESTERS, SULFATE ESTERS AND SULFONATE ESTERS, WHICH COMPRISES DIRECTLY CROSSLINKING AT A TEMPERATURE OF AT LEAST 50* C. SUCH POLYMERIC MATERIAL WITH ABOUT 5%, BASED ON THE WEIGHT OF SAID POLYMERIC MATERIALS, OF A POLYTHIOURES COMPOUND CONTAINING THE FOLLOWING GROUP:
References Cited (Backward Citations)
US2436080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |