Patent US735179A successfully refreshed from Google Patents.
Patent US3249584A successfully refreshed from Google Patents.
US3249584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylchloride stabilized with urea and butyl amino crotonate
Assignee: Montedison SpA
•
Filing: 1962-02-12
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Granted: 1966-05-03
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Expires: 1982-02-12
Abstract
No abstract record available.
Inventors
- 👤 Gasparis Giovanni De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/175; C08K5/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A HEAT STABILIZED COMPOSITION COMPRISING POLYVINYL CHLORIDE AND A MIXTURE OF UREA AND BUTYL AMINO CROTONATE, THE AMOUNT OF SAID MIXTURE BEING FROM ABOUT 0.02 TO 2% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE POLYVINYL CHLORIDE, UREA, AND BUTYL AMINO CROTONATE.
Claim 2
Dependent Claim
43 words
A HEAT STABILIZED COMPOSITION COMPRISING POLYVINYL CHLORIDE AND A MIXTURE OF UREA AND BUTYL AMINO CROTONATE, THE AMOUNT OF SAID MIXTURE BEING FROM ABOUT 0.02 TO 2% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE POLYVINYL CHLORIDE, UREA, AND BUTYL AMINO CROTONATE.
References Cited (Backward Citations)
US2103581A
Cited
GB454232A
Cited
US2327517A
Cited
GB562195A
Cited
US2313757A
Cited
US2557474A
Cited
US2555167A
Cited
DE807207C
Cited
GB810332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |