US2799685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polycyclic sulfites and a process for their manufacture
Assignee: Hoechst AG
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Filing: 1955-04-08
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Granted: 1957-07-16
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Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Frensch Heinz
- 👤 Goebel Helmut
- 👤 Staudermann Wilhelm
- 👤 Finkenbrink Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:51
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/10; C07C; C07C33/00; C07C33/40; C07C33/50; D; D21; D21H; D21H21/00; D21H21/14; D21H21/36; B; B27; B27K; B27K3/00; B27K3/34; B27K3/343; B27K3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL 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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |