US2804439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rosin-vinylsilane adducts and polymers thereof
Assignee: Wyeth Holdings LLC
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Filing: 1953-11-10
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Granted: 1957-08-27
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Expires: 1973-11-10
Abstract
No abstract record available.
Inventors
- 👤 Erhart K Drechsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:57
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C09; C09F; C09F1/00; C09F1/04; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE DIELS-ALDER ADDUCT OF ROSIN WITH A COMPOUND OF THE FORMULA CH2=CH-SIX3, WHEREIN THE X''S REPRESENT HYDROLYZABLE SUBSTITUENTS.
Claim 2
Dependent Claim
18 words
THE DIELS-ALDER ADDUCT OF ROSIN WITH A COMPOUND OF THE FORMULA CH2=CH-SIX3, WHEREIN THE X''S REPRESENT HYDROLYZABLE SUBSTITUENTS.
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |