US2442958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides of trimethyladipic acid
Assignee: Shell Development Co
•
Filing: 1944-06-12
•
Granted: 1948-06-08
•
Expires: 1964-06-12
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Dannenberg Hans
- 👤 Harry De V Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:27
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/316
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |