Patent US2496843A successfully refreshed from Google Patents.
Patent US3108916A successfully refreshed from Google Patents.
US3108916A
Expired / Lapsed
US
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Dustless propellent powder containing coated spherical nitrocellulose
Assignee: Olin Corp
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Filing: 1959-09-02
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Granted: 1963-10-29
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Expires: 1979-09-02
Abstract
No abstract record available.
Inventors
- 👤 Coffee Ralph Edwin
- 👤 Kucia Richard Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:57
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0083; C06B45/00; C06B45/18; C06B45/20; C06B45/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A DUSTLESS ASTATIC PROPELLENT POWDER CHARGE CONSISTING ESSENTIALLY OF NITROCELLULOSE BASE PROPELLENT POWDER GRAINS PROVIDED WITH A SUBSTANTIALLY UNIFORM SURFACE COATING OF FROM ABOUT 0.02 TO 0.05% BY WEIGHT OF LIQUID ESTER FORMED BY THE ESTERIFICATION OF A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ACID AND THE DIBASIC SATURATED ALIPHATIC ACIDS HAVING BETWEEN 4 AND 8 CARBON ATOMS IN THEIR ALKYL CHAINS WITH A SATURATED ALIPHATIC ALCOHOL CONTAINING BETWEEN 6 AND 12 CARBON ATOMS IN THE ALKYL CHAIN, THE INTERIOR OF THE GRAINS BEING SUBSTANTIALLY DEVOID OF THE ESTER.
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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |