US3383267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of products of resin impregnated, fibrous material
Assignee: Perstorp AB
•
Filing: 1963-06-06
•
Granted: 1968-05-14
•
Expires: 1983-06-06
Abstract
No abstract record available.
Inventors
- 👤 Nils B Sunden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:15
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/5205; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/415; D21H21/00; D21H21/14; D21H21/34; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
IN THE METHOD OF PLASTIC LAMINATES FROM PAPER SHEETS IMPREGNATED WITH A PHENOL-FORMALDEHYDE RESIN, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID RESIN, PRIOR TO IMPREGNATING THE PAPER SHEETS, A SALT FORMED FROM PHOSPHORIC ACID AND AN AMINE HAVING A CARBON/NITROGEN RATIO OF 1-3.
Claim 2
Dependent Claim
43 words
IN THE METHOD OF PLASTIC LAMINATES FROM PAPER SHEETS IMPREGNATED WITH A PHENOL-FORMALDEHYDE RESIN, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID RESIN, PRIOR TO IMPREGNATING THE PAPER SHEETS, A SALT FORMED FROM PHOSPHORIC ACID AND AN AMINE HAVING A CARBON/NITROGEN RATIO OF 1-3.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |