Patent US3493573A successfully refreshed from Google Patents.
US3493573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimethyl xanthine derivatives and production thereof
Assignee: Recherches Pharmaceutiques et Scientifiques
•
Filing: 1967-07-31
•
Granted: 1970-02-03
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Maurice Joullie
- 👤 Michel Laurre
- 👤 Gabriel Maillard
- 👤 Pierre Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/519; A61K31/52; C07D473/06; C07D473/08; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2924598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |