Patent US3871132A successfully refreshed from Google Patents.
US3871132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed tablet
Assignee: FMC Corp
•
Filing: 1973-08-20
•
Granted: 1975-03-18
•
Expires: 1993-08-20
Abstract
Abstract A seed tablet comprised of one or more seeds encased in a mixture of vermiculite and a dextrin binder having a pH value of about 3. In forming the tablet the binder material is cooked with water and the resulting solution is thoroughly mixed with the dry vermiculite with the vermiculite-binder-water ratio in the mix being about 20-1-3. The tablets are then formed by placing a seed or seeds within the mixture in a die and compressing it into a rigid cylindrical tablet with a compression ratio of 3 1/2-1. Finally, the tablet is dried to reduce the moisture content to the equilibrium level of about 2% whereby the tablet can be readily handled by mechanical equipment without damage thereto.
Inventors
- 👤 Edwin H Brink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:23
CPC Classifications
A; A01; A01C; A01C1/00; A01C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A HIGH STRENGTH SEED TABLET COMPRISING ONR OR MORE SEEDS ENCASED IN A MIXTURE OF DEXTRIN BINDER WITH A PH VALUE OF ABOUT 3, VERMICULITE AND WATER, THE WATER CONTENT BEING AT LEAST ABOUT 12% BY WEIGHT IN THE WET MIXTURE, THE RATIO OF VERMICULITE TO BINDER BEING APPROXIMATELY 20:1, AND THE MIXTURE BEING COMPRESSED ABOUT THE SAID SEED SO THAT THE ORIGINAL COMPRESSED MIXTURE IS REDUCED IN VOLUME BY A FACTOR OF NO MORE THAN 3 1.2-1.
Claim 2
Dependent Claim
78 words
A HIGH STRENGTH SEED TABLET COMPRISING ONR OR MORE SEEDS ENCASED IN A MIXTURE OF DEXTRIN BINDER WITH A PH VALUE OF ABOUT 3, VERMICULITE AND WATER, THE WATER CONTENT BEING AT LEAST ABOUT 12% BY WEIGHT IN THE WET MIXTURE, THE RATIO OF VERMICULITE TO BINDER BEING APPROXIMATELY 20:1, AND THE MIXTURE BEING COMPRESSED ABOUT THE SAID SEED SO THAT THE ORIGINAL COMPRESSED MIXTURE IS REDUCED IN VOLUME BY A FACTOR OF NO MORE THAN 3 1.2-1.
References Cited (Backward Citations)
US2553577A
Cited
US2967376A
Cited
US3555730A
Cited
US3648409A
Cited
US3703404A
Cited
US3690034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |