Patent US3522160A successfully refreshed from Google Patents.
US3522160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of addition products of derivatives of maleic acid and acetylene
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1966-12-28
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Granted: 1970-07-28
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Gunther Otto Schenck
- 👤 Peter Gottfried Fuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/52; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/91; Y10S204/912; Y10S204/914
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) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |