Patent US3349121A successfully refreshed from Google Patents.
US3349121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting together unsaturated amides, formaldehyde, and secondary amines and the products formed thereby
Assignee: Bayer AG
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Filing: 1963-10-15
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Granted: 1967-10-24
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:23
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; C; C07; C07C; C07C255/00; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60; C08F28/00; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; D06M15/29
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A PROCESS WHICH COMPRISES REACTING AT TEMPERATURES FROM 30 TO 100*C. AND AT A PH OF ABOVE 7 (1) A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
24 words
A PROCESS WHICH COMPRISES REACTING AT TEMPERATURES FROM 30 TO 100*C. AND AT A PH OF ABOVE 7 (1) A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |