Patent US3681268A successfully refreshed from Google Patents.
US3681268A
Expired / Lapsed
US
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Mastic adhesive composition containing zinc salt of formaldehyde-modified rosin
Assignee: United States Department of Agriculture
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Filing: 1970-02-27
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Granted: 1972-08-01
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Expires: 1990-02-27
Abstract
Abstract MASTIC ADHESIVE COMPOSITIONS HAVING EXCELLENT PROPERTIES FOR ADHESIVE APPLICATIONS IN THE BUILDING TRADES INDUSTRY, WHICH COMPOSITIONS COMPRISE RELATIVE PROPORTIONS BY WEIGHT OF: 100 PARTS OF A RUBBER SELECTED FROM THE GROUP CONSISTING OF RECLAIM, NATURAL, STYRENE-BUTADIENE RUBBERS; 50 TO 200 PARTS BY WEIGHT OF A ZINC SALT OF THE FORMALDEHYDE-MODIFIED ROSIN FROM REACTING 2 TO 10 PARTS BY WEIGHT OF FORMALDEHYDE WITH 100 PARTS BY WEIGHT OF MOLTEN ROSIN, WHICH ZINC SALT OF FORMALDEHYDE-MODIFIED ROSIN HAS A B&R SOFTENING POINT BETWEEN 95* AND 150*C.; AND A HYDROCARBON VEHICLE FOR THE RUBBER.
Inventors
- 👤 Albert R Bunk
- 👤 Bailey Bennett
- 👤 David A Berry
- 👤 Noah J Halbrook
- 👤 Walter H Schuller
- 👤 Ray V Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:45
CPC Classifications
C; C09; C09J; C09J121/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |