Patent US2604423A successfully refreshed from Google Patents.
US2604423A
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Cellophane laminated with styreneisobutylene copolymer
Assignee: Standard Oil Development Co
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Filing: 1944-10-06
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Granted: 1952-07-22
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Expires: 1964-10-06
Abstract
No abstract record available.
Inventors
- 👤 Ober C Slotterbeck
- 👤 William H Smyers
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/442; B; B29; B29C; B29C48/00; B29C48/15; B32; B32B; B32B27/00; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; H01B3/441; B29C48/03; B29C48/05; B29C48/06; B29C48/07; B29C48/08; C08F; C08F210/00; C08F210/04; C08F210/08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L91/00; C08L91/06; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
LAMINATED SHEET MATERIAL CONSISTING OF TWO SHEETS OF REGENERATED CELLULOSE WITH AN INTERMEDIATE LAYER OF A STYRENE-ISOBUTYLENE COPOLYMER HAVING AN INTRINSIC VISCOSITY ABOVE 0.6 AND A COMBINED STYRENE CONTENT OF ABOUT 50 TO 70%.
Claim 2
Dependent Claim
34 words
LAMINATED SHEET MATERIAL CONSISTING OF TWO SHEETS OF REGENERATED CELLULOSE WITH AN INTERMEDIATE LAYER OF A STYRENE-ISOBUTYLENE COPOLYMER HAVING AN INTRINSIC VISCOSITY ABOVE 0.6 AND A COMBINED STYRENE CONTENT OF ABOUT 50 TO 70%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |