US2513826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic sulfonhydrazides
Assignee: GAF Chemicals Corp
•
Filing: 1946-12-05
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Granted: 1950-07-04
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Expires: 1966-12-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Sprung
- 👤 Willy A Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:05
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/135
Claims Analysis
Total Claims: 0
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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) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |