Patent US3734987A successfully refreshed from Google Patents.
US3734987A
Expired / Lapsed
US
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Gel capsules for small units and methods of encapsulating such units
Assignee: FORENADE SUPERFOSFATFABRIKER A
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Filing: 1971-01-22
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Granted: 1973-05-22
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Expires: 1991-01-22
Abstract
Abstract A METHOD OF ENCAPSULATING SMALL UNITS SUCH AS PHARMACEUTICAL PREPARATIONS, SEED AND THE LIKE BY A CHEMICAL PROCESS FOR OBTAINING A HOLLOW CAPSULE IN WHICH THE UNIT IS CONTAINED, SAID CAPSULE PREFERABLY BEING FORMED OF GENLATIONOUS MATTER AND INFLATED BY MEANS OF A GAS GENERATED BY A CHEMICAL COMPOSITTION COVERING SAID UNIT.
Inventors
- 👤 B Staffan
- 👤 A Hamrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:06
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/18; B01J13/185
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |