US2828286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of formaldehyde
Assignee: EIDP Inc
•
Filing: 1953-06-30
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Granted: 1958-03-25
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Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Macdonald Robert Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:43
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/08; Y; Y10; Y10S; Y10S74/00; Y10S74/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE PROCESS FOR POLYMERIZING FORMALDEHYDE COMPRISING CONTACTING ANHYDROUS MONOMERIC FORMALDEHYDE IN INTIMATE ASSOCIATION WITH AN ANHYDROUS ORGANIC MEDIUM WHICH IS CHEMICALLY INERT TO FORMALDEHYDE, IS A NONSOLVENT FOR POLYMERIC FORMALDEHYDE AT THE REACTION TEMPERATURE, AND REMAINS LIQUID UNDER THE POLYMERIZATION CONDITIONS, WITH A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
48 words
THE PROCESS FOR POLYMERIZING FORMALDEHYDE COMPRISING CONTACTING ANHYDROUS MONOMERIC FORMALDEHYDE IN INTIMATE ASSOCIATION WITH AN ANHYDROUS ORGANIC MEDIUM WHICH IS CHEMICALLY INERT TO FORMALDEHYDE, IS A NONSOLVENT FOR POLYMERIC FORMALDEHYDE AT THE REACTION TEMPERATURE, AND REMAINS LIQUID UNDER THE POLYMERIZATION CONDITIONS, WITH A COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2296249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |