Patent US2607803A successfully refreshed from Google Patents.
US2607803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
S-polyalkylene glycol derivatives of thiuronium salts
Assignee: Wyeth Holdings LLC
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Filing: 1948-12-08
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Granted: 1952-08-19
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Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Hans Z Lecher
- 👤 Chao Tsai Hsiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:35
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/30; C07C335/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS 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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |