US2587171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated article having an unimpregnated surface and method of making the same
Assignee: Union Carbide Corp
•
Filing: 1950-01-07
•
Granted: 1952-02-26
•
Expires: 1970-01-07
Abstract
No abstract record available.
Inventors
- 👤 Knewstubb Norman Watson
- 👤 Jenkins Colin Neri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:14
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/249921; Y10T428/249994; Y10T428/31; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE PREPARATION OF A LAMINATED SHEET WHICH COMPRISES SUPERPOSING FIBROUS SHEETS IMPREGNATED WITH THERMOSETTING SYNTHETIC RESIN, INTERLEAVING IN AT LEAST ONE PLACE IN THE STACK A SINGLE SHEET OF ROUGH, POROUS PAPER WHICH HAS NOT BEEN TREATED WITH SYNTHETIC RESIN, MOLDING UNDER HEAT AND PRESSURE, AND SUBSEQUENTLY SPLITTING THE RESULTANT SHEET IN THE PLANE OR PLANES OF THE UNIMPREGNATED PAPER SHEET.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF A LAMINATED SHEET WHICH COMPRISES SUPERPOSING FIBROUS SHEETS IMPREGNATED WITH THERMOSETTING SYNTHETIC RESIN, INTERLEAVING IN AT LEAST ONE PLACE IN THE STACK A SINGLE SHEET OF ROUGH, POROUS PAPER WHICH HAS NOT BEEN TREATED WITH SYNTHETIC RESIN, MOLDING UNDER HEAT AND PRESSURE, AND SUBSEQUENTLY SPLITTING THE RESULTANT SHEET IN THE PLANE OR PLANES OF THE UNIMPREGNATED PAPER SHEET.
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |