US3221025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic carbonates
Assignee: General Electric Co
•
Filing: 1961-12-21
•
Granted: 1965-11-30
•
Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Prochaska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:18
CPC Classifications
C; C07; C07D; C07D321/00; C07D321/02; C07D321/10; C07D321/12; C07D323/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN AROMATIC CYCLIC CARBONATE MONOMER OF THE FORMULA
Claim 2
Dependent Claim
8 words
AN AROMATIC CYCLIC CARBONATE MONOMER OF 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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |