Patent US3342785A successfully refreshed from Google Patents.
US3342785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-hydroxy-3-methylcyclobutanecarboxylic acids, lactones thereof and their polymers
Assignee: EIDP Inc
•
Filing: 1963-12-20
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Granted: 1967-09-19
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Elwood P Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:25
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
A HYDROXYCARBOXYLIC ACID OF THE FORMULA
Claim 2
Dependent Claim
6 words
A HYDROXYCARBOXYLIC ACID OF THE FORMULA
Claim 3
Dependent Claim
32 words
A POLYMER OF AN ACID OF CLAIM 12 HAVING AN INHERENT VISCOSITY OF AT LEAST 0.05 AND CONTAINING, TO THE EXTENT OF AT LEAST 5% BY WEIGHT, RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |