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Patent US2844561A successfully refreshed from Google Patents.
US2844561A
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Dispersion polymerization of formaldehyde in the presence of an organic synthetic polymer
Assignee: EIDP Inc
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Filing: 1953-06-30
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Granted: 1958-07-22
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Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Bechtold Max Fredrick
- 👤 Macdonald Robert Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:36
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/08; C08L; C08L59/00; C08L59/02; C08L23/00; C08L29/00; C08L29/02; Y; Y10; Y10S; Y10S74/00; Y10S74/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A NORMALLY SOLID, SYNTHETIC, FILM-FORMING COMPOSITION RESULTING FROM THE POLYMERIZATION OF FORMALDEHYDE IN A LIQUID HYDROCARBON MEDIUM CONTAINING A DISSOLVED ORGANIC POLYMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF (A) HOMOPOLYMERS OF TERTIARY-AMINO-SUBSTITUTED OLEFINS, (B) HOMOPOLYMERS OF ESTERS OF N-DIHYDROCARBONSUBSTITUTED AMINOALCOHOLS WITH AN ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
47 words
A NORMALLY SOLID, SYNTHETIC, FILM-FORMING COMPOSITION RESULTING FROM THE POLYMERIZATION OF FORMALDEHYDE IN A LIQUID HYDROCARBON MEDIUM CONTAINING A DISSOLVED ORGANIC POLYMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF (A) HOMOPOLYMERS OF TERTIARY-AMINO-SUBSTITUTED OLEFINS, (B) HOMOPOLYMERS OF ESTERS OF N-DIHYDROCARBONSUBSTITUTED AMINOALCOHOLS WITH AN ACID HAVING THE FORMULA:
References Cited (Backward Citations)
US2138763A
Cited
US2568018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |