US3336265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen-containing polymeric products, their preparation and use
Assignee: Shell USA Inc
•
Filing: 1964-09-08
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Granted: 1967-08-15
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Richard A Palm
- 👤 Hans H W Ohse
- 👤 Harald H O Cherdron
- 👤 Friedrich W A G K Korte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/02; C07D407/04; C08; C08F; C08F24/00; C08F8/00; C08F8/30; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF NEW POLYMERS WHICH CAN BE CROSS-LINKED AND HAVE IMPROVED SOLUBILITY IN WATER WHICH COMPRISES REACTING IN AN AQUEOUS MEDIUM AN ADDITION POLYMER OF AN UNSATURATED HETEROCYCLIC SUBSTITUTED LACTONE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF NEW POLYMERS WHICH CAN BE CROSS-LINKED AND HAVE IMPROVED SOLUBILITY IN WATER WHICH COMPRISES REACTING IN AN AQUEOUS MEDIUM AN ADDITION POLYMER OF AN UNSATURATED HETEROCYCLIC SUBSTITUTED LACTONE OF THE GENERAL FORMULA
References Cited (Backward Citations)
US3161656A
Cited
US3116301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |