Patent US3025271A successfully refreshed from Google Patents.
US3025271A
Expired / Lapsed
US
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Mixed esters of citric acid and polymers thereof
Assignee: Bayer Corp
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Filing: 1959-06-24
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Granted: 1962-03-13
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Expires: 1979-06-24
Abstract
No abstract record available.
Inventors
- 👤 Peter J Borchert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:26
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; C07; C07C; C07C69/00; C07C69/66; C07C69/67
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
6. HOMOPOLYMERS OF COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
6. HOMOPOLYMERS OF COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
US2062917A
Cited
US2275467A
Cited
US2332896A
Cited
US2437962A
Cited
US2445189A
Cited
US2545184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |