US3775512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer cross-linking using system containing n-methylol amide groups and an acidic sulfamate compound
Assignee: Gulf Canada Ltd
•
Filing: 1972-01-21
•
Granted: 1973-11-27
•
Expires: 1992-01-21
Abstract
Abstract CROSS-LINKING OF POLYMER IS DISCLOSED USING A CROSSLINKABLE SYSTEM CONTAINING N-METHYLOLAMIDE GROUPS AND AS CATALYST AT ACIDIC PH A WATER-SOLUBLE COMPOUND CONTAINING A SULFAMATE GROUP.
Inventors
- 👤 R Lanthier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |