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Patent US3950403A successfully refreshed from Google Patents.
US3950403A
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Spiro compounds
Assignee: Novartis Corp
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Filing: 1974-12-02
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Granted: 1976-04-13
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Expires: 1994-12-02
Abstract
Abstract Compounds which contain a group bonded directly to an aromatic nucleus of the formula --(CH.sub.2 --).sub.n --X 1. in which n is a positive integer having a value of at least 2 and X represents a removable substituent.
Inventors
- 👤 Paul Rys
- 👤 Rolf Vogelsanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/78; C09B62/82; C09B62/825; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/41; C07C309/43; C07C49/00; C07C49/587; C07C49/657; C07C49/665; C07C49/675; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; C09B43/00; C09B43/003; C09B43/12; C09B43/124; C09B43/1247; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/918
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
A compound of the formula ##SPC16## wherein X is chlorine, bromine or iodine.
Claim 2
Dependent Claim
13 words
A compound of the formula ##SPC16## wherein X is chlorine, bromine or iodine.
Claim 3
Dependent Claim
9 words
The compound of claim 1, wherein X is chlorine.
References Cited (Backward Citations)
US3875216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |