US3557205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polyacid halides
Assignee: Pennwalt Corp
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Filing: 1967-08-23
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Granted: 1971-01-19
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Expires: 1987-08-23
Abstract
Abstract A STABILIZED ORGANIC POLYACID HALIDE SOLUTION CONTAINING A FORMAMIDE AND THIONYL HALIDE OR SULFURYL HALIDE. EXAMPLE: SEBACYL CHLORIDE CONTAINING 1% THINYL CHLORIDE AND 0.5% N,N-DIMETHYFORMAMIDE.
Inventors
- 👤 John E Santo
- 👤 Jan E Vandegaer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58; C07C51/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |