US2764575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resins from oxacyclobutane compounds and dicarboxylic acids
Assignee: Henkel AG and Co KGaA
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Filing: 1952-09-30
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Granted: 1956-09-25
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Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 Kohler Rudolf
- 👤 Pietsch Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:58
CPC Classifications
C; C09; C09J; C09J167/00; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AS A NEW SYNTHETIC RESIN A CONDENSATION PRODUCT OF A COMPOUND HAVING AT LEAST 2 OXYACYCLOBUTANE RINGS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS, POLCARBOXYLIC ACID NNHYDRIDES, AND POLYCARBOXYLIC ACID CHLORIDES.
Claim 2
Dependent Claim
35 words
AS A NEW SYNTHETIC RESIN A CONDENSATION PRODUCT OF A COMPOUND HAVING AT LEAST 2 OXYACYCLOBUTANE RINGS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS, POLCARBOXYLIC ACID NNHYDRIDES, AND POLYCARBOXYLIC ACID CHLORIDES.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |