Patent US2525071A successfully refreshed from Google Patents.
US2525071A
Expired / Lapsed
US
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Laminated sheet material and compositions
Assignee: Standard Oil Development Co
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Filing: 1945-11-30
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Granted: 1950-10-10
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Expires: 1965-11-30
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hardy
- 👤 William J Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F10/00; C08K; C08K3/00; C08K3/34; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A LAMINATED SHEET MATERIAL INCLUDING PAPER HAVING CALENDERED THEREON A SUBSTANTIALLY TRANSPARENT, MOISTURE-PROOF, FLEXIBLE, COMBUSTION-RESISTANT SURFACE FILM COMPRISING A STYRENE-ISOBUTYLENE POLYMER HAVING AN INTRINSIC VICOSITY GREATER THAN 0.6 AND A COMBINED STYRENE CONTENT OF 45 TO 65 WEIGHT PER CENT, HAVING HOMOGENEOUSLY ADMIXED THEREWITH 20 TO 60% BY WEIGHT OF POWDERED SODIUM MONTMRILLONITE HAVING A FINENESS OF AT LEAST 95% THROUGH A 100 MESH SCREEN.
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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |