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US3634352A
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Synthetic rubber compositions tackified by modified pine gum
Assignee: United States Department of Agriculture
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Filing: 1969-08-29
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Granted: 1972-01-11
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Expires: 1989-08-29
Abstract
Abstract SBR, NITRILE, AND EPDM SYNTHETIC RUBBER COMPOSITIONS OF ENHANCED BUILDING TACK FROM A CONTENT THEREIN OF FROM 1/2 TO 15 PHR. OF MODIFIED PINE GUM WHICH IS THE REACTION PRODUCT OF MALEIC ACID, FUMARIC ACID, MALEIC AHYDRIDE, OR A MIXTURE THEREOF WITH PINE OLEORESIN IN AN INERT ATMOSPHERE.
Inventors
- 👤 William J Mueller
- 👤 David A Berry
- 👤 Noah J Halbrook
- 👤 Walter H Schuller
- 👤 Ray V Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:25
CPC Classifications
C; C08; C08L; C08L9/00; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08L23/00; C08L23/02; C08L23/16; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |