Patent US3134756A successfully refreshed from Google Patents.
US3134756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of diallyl barbituric acids and sulfur dioxide
Assignee: 3M Co
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Filing: 1960-12-05
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Granted: 1964-05-26
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Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 John R Mattson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A LINEAR COPOLYMER COMPOSED SUBSTANTIALLY OF REPEATING UNITS OF THE FORMULA:
Claim 2
Dependent Claim
11 words
A LINEAR COPOLYMER COMPOSED SUBSTANTIALLY OF REPEATING UNITS OF THE FORMULA:
References Cited (Backward Citations)
US1261235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |