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US2744138A
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Di-guanidino-phenol ethers
Assignee: Pfizer Italia SRL
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Filing: 1952-07-17
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Granted: 1956-05-01
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Expires: 1972-07-17
Abstract
No abstract record available.
Inventors
- 👤 Marco Aurelio Di
- 👤 Pasini Claudio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:45
CPC Classifications
C; C07; C07C; C07C279/00; C07C279/04; C07C279/12; C07C277/00; C07C277/08; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |