Patent US2583081A successfully refreshed from Google Patents.
Patent US3296179A successfully refreshed from Google Patents.
US3296179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxidized polymer of butadiene cured with oxalic or malonic acid at room temperature
Assignee: FMC Corp
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Filing: 1963-03-25
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Granted: 1967-01-03
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Lister Fred
- 👤 Charles G Cullen
- 👤 Theodore R Hopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/40; C08G59/18; C08G59/40; C08G59/42; C08G59/4207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF CURING AN EPOXIDIZED POLYMER OF BUTADIENE AT ROOM TEMPERATURE TO A HARD, TOUGH, ADHERENT AND SOLVENT AND CHEMICAL REISTANT FILM WHICH COMPRISES: MIXING (A) AN EPOXIDIZED POLYMER OF BUADIENE HAVIGN AN OXIRANE OXYGEN CONTENT OF 6-12% BY WEIGHT IN WHICH 60-100% OF THE POLYMER FORMING UNITS ARE DERIVED FROM BUTADIENE AND THE BALANCE FROM AN ETHYLENICALLY UNSATURATED COMNOMER AND (B) A VOLATILE ORGANIC SOLVENT SOLUTION OF A DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID AND MALONIC ACID CONTAINING 0.05-0.4 MOLE OF DICARBOXYLIC ACID PER OXIRANE EQUIVALENT OF EPOXIDIZED POLYMER OF BUTADIENE, APPLYING THE MIXTURE AS A COATING, AND ALLOWING THE COATING TO CURE AT ROOM TEMPERATURE.
Claim 2
Independent Claim
112 words
A METHOD OF CURING AN EPOXIDIZED POLYMER OF BUTADIENE AT ROOM TEMPERATURE TO A HARD, TOUGH, ADHERENT AND SOLVENT AND CHEMICAL REISTANT FILM WHICH COMPRISES: MIXING (A) AN EPOXIDIZED POLYMER OF BUADIENE HAVIGN AN OXIRANE OXYGEN CONTENT OF 6-12% BY WEIGHT IN WHICH 60-100% OF THE POLYMER FORMING UNITS ARE DERIVED FROM BUTADIENE AND THE BALANCE FROM AN ETHYLENICALLY UNSATURATED COMNOMER AND (B) A VOLATILE ORGANIC SOLVENT SOLUTION OF A DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID AND MALONIC ACID CONTAINING 0.05-0.4 MOLE OF DICARBOXYLIC ACID PER OXIRANE EQUIVALENT OF EPOXIDIZED POLYMER OF BUTADIENE, APPLYING THE MIXTURE AS A COATING, AND ALLOWING THE COATING TO CURE AT ROOM TEMPERATURE.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |