US2845399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weathering of isoolefin-vinyl aromatic copolymers containing hydroxy benzaldehydes
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-12-29
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Granted: 1958-07-29
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Newberg
- 👤 Robert E Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/18; C09D123/20; C09D123/22; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C09D125/00; C09D125/02; C09D125/04; C09D125/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A COMPOSITION COMPRISING A COPOLYMER OF ABOUT 10 TO 90% OF A C4 TO C8 ISOOLEFIN WITH ABOUT 10 TO 90% OF A VINYL AROMATIC HYDROCARBON AND ABOUT 0.25% TO 20% OF A HYDROXY BENZALDEHYDE.
Claim 2
Dependent Claim
35 words
A COMPOSITION COMPRISING A COPOLYMER OF ABOUT 10 TO 90% OF A C4 TO C8 ISOOLEFIN WITH ABOUT 10 TO 90% OF A VINYL AROMATIC HYDROCARBON AND ABOUT 0.25% TO 20% OF A HYDROXY BENZALDEHYDE.
References Cited (Backward Citations)
US2364027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |