US3040004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-iminopyrrolidones and polymers therefrom
Assignee: GAF Chemicals Corp
•
Filing: 1958-04-04
•
Granted: 1962-06-19
•
Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Glickman
- 👤 Miller Edgar Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:37
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
IN THE PROCESS OF POLYMERIZING LACTAMS OF THE FORMULA
Claim 2
Dependent Claim
9 words
IN THE PROCESS OF POLYMERIZING LACTAMS OF THE FORMULA
References Cited (Backward Citations)
US2638463A
Cited
US2809958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |