Patent US6387380B1 successfully refreshed from Google Patents.
US2446536A
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Treatment of styrene-isobutylene polymer films and resultant product
Assignee: Standard Oil Development Co
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Filing: 1945-05-12
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Granted: 1948-08-10
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Expires: 1965-05-12
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J2323/00; C08J2323/02; C08J2323/18; C08J2323/20; C08J2323/22; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1928988A
Cited
US2102456A
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US2272398A
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GB513521A
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US2213423A
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US2274749A
Cited
US2400720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |