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Patent US2815351A successfully refreshed from Google Patents.
US2815351A
Expired / Lapsed
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Heterobicyclic compounds and process for their preparation
Assignee: Union Carbide Corp
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Filing: 1954-05-12
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Granted: 1957-12-03
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Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Stansbury
- 👤 Howard R Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:47
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
CHEMICAL COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
CHEMICAL COMPOUNDS HAVING THE 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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |