Patent US6667435B1 successfully refreshed from Google Patents.
Patent US3639093A successfully refreshed from Google Patents.
US3297701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of diazabicyclo-(2, 2, 2)-octane and derivatives
Assignee: Jefferson Chemical Co Inc
•
Filing: 1964-05-28
•
Granted: 1967-01-10
•
Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter H Brader
- 👤 Richard L Rowton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD WHICH COMPRISES THE STEPS OF CONTACTING A FEED COMPOUND WITH A METAL PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM PHOSPHATE, CALCIUM PHOSPHATE AND IRON PHOSPHATE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250* TO ABOUT 550*C. TO FORM A REACTION MIXTURE COMPRISING A DIAZABICYCLO-(2.2.2)-OCTANE CORRESPONDING TO THE FEED COMPOUND, SAID FEED COMPOUND HAVING THE FORMULA:
Claim 2
Independent Claim
59 words
A METHOD WHICH COMPRISES THE STEPS OF CONTACTING A FEED COMPOUND WITH A METAL PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM PHOSPHATE, CALCIUM PHOSPHATE AND IRON PHOSPHATE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250* TO ABOUT 550*C. TO FORM A REACTION MIXTURE COMPRISING A DIAZABICYCLO-(2.2.2)-OCTANE CORRESPONDING TO THE FEED COMPOUND, SAID FEED COMPOUND HAVING THE FORMULA:
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |