US2810708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of formaldehyde polymers with hydrazines
Assignee: EIDP Inc
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Filing: 1952-12-23
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Granted: 1957-10-22
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Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 Michael A Kubico
- 👤 Robert N Macdonald
- 👤 Robert L Stearns
- 👤 Frederick A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08K5/16; C08K5/22; C08K5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE NORMALLY SLOID, THERMALLY STABILIZED, POLYMERIC COMPOSITION WHICH CO,PRISES A HIGH MOLECULAR WEIGHT, FILM-FORMING, FORMALDEHYDE ADDITON PLYMER HAVING RECURRING-CH2O-UNITS IN THE POLYMER CHAIN AND EXHIBITING AN INHERENT VISCOSITY OF AT LEAST 1, SAID INHERENT VISCOSITY BEING MEASURED AT 60*C, ON A 0.5% SOLUTION OF SAID POLYMER IN P-CHLOROPHENOL CONTAINING 2% BY WEIGHT OF ALPHA-PINEMNE, AND 0.001% TO 10% BY WEIGHT OF A MEMBER OF THE GROUP OF THERMAL STABILIZING COMPOUNDS CONSISTING OF HYDRAZINE,HYDROCARBON-SUBSTITUTED HYDRAZINES, AND HYDRAZIDES.
Claim 2
Dependent Claim
76 words
THE NORMALLY SLOID, THERMALLY STABILIZED, POLYMERIC COMPOSITION WHICH CO,PRISES A HIGH MOLECULAR WEIGHT, FILM-FORMING, FORMALDEHYDE ADDITON PLYMER HAVING RECURRING-CH2O-UNITS IN THE POLYMER CHAIN AND EXHIBITING AN INHERENT VISCOSITY OF AT LEAST 1, SAID INHERENT VISCOSITY BEING MEASURED AT 60*C, ON A 0.5% SOLUTION OF SAID POLYMER IN P-CHLOROPHENOL CONTAINING 2% BY WEIGHT OF ALPHA-PINEMNE, AND 0.001% TO 10% BY WEIGHT OF A MEMBER OF THE GROUP OF THERMAL STABILIZING COMPOUNDS CONSISTING OF HYDRAZINE,HYDROCARBON-SUBSTITUTED HYDRAZINES, AND HYDRAZIDES.
References Cited (Backward Citations)
US1793635A
Cited
GB561999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |