Patent US3137729A successfully refreshed from Google Patents.
US3137729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Products from the reaction of alkynes and secondary amines
Assignee: Phillips Petroleum Co
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Filing: 1960-08-12
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Granted: 1964-06-16
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Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 Carl W Kruse
- 👤 Roger F Kleinschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AS A COMPOUND MEMBER OF THE GROUP REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
11 words
AS A COMPOUND MEMBER OF THE GROUP REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2273141A
Cited
US2613208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |