Patent US2629740A successfully refreshed from Google Patents.
US2629740A
Expired / Lapsed
US
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Polyether amines and a process for their production
Assignee: Wyeth Holdings LLC
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Filing: 1948-05-04
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Granted: 1953-02-24
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Expires: 1968-05-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Carnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:44
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE PROCESS WHICH COMPRISES CONDENSING N MOLES OF AN EPOXY COMPOUND OF THE TYPE
Claim 2
Dependent Claim
14 words
THE PROCESS WHICH COMPRISES CONDENSING N MOLES OF AN EPOXY COMPOUND OF THE TYPE
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) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |