US3213104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclohexanespirohydantoins
Assignee: —
•
Filing: —
•
Granted: 1965-10-19
•
Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A SUBSTITUTED CYCLOHEXANESPIROHYUDANTOIN OF THE FORMULA
Claim 2
Dependent Claim
6 words
A SUBSTITUTED CYCLOHEXANESPIROHYUDANTOIN OF THE FORMULA
References Cited (Backward Citations)
US2225384A
Cited
US2155863A
Cited
US2516635A
Cited
US2516145A
Cited
US2704287A
Cited
US2994640A
Cited
US2935448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |