Patent US2973257A successfully refreshed from Google Patents.
US2973257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellent powder
Assignee: Olin Corp
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Filing: 1951-06-14
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Granted: 1961-02-28
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Expires: 1971-06-14
Abstract
No abstract record available.
Inventors
- 👤 Don W Ryker
- 👤 Gilbert R Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:32
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066; C06B23/00; C06B23/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
IN THE MANUFACTURE OF POWDER GRAINS BY A PROCESS WHICH INVOLVES DISPERSING GLOBULES OF LACQUER CONTAINING A SMOKELESS POWDER BASE AND A VEHICLE IN AN AQUEOUS MEDIUM AND THEREAFTER SOLIDIFYING THE GLOBULES WHILE DISPERSED, THE METHOD OF SHAPING AND SOLIDIFYING LACQUER GLOBULES INTO GELATINIZED DROPLETS OF SMOKELESS POWDER BASE HAVING LEAD THEREIN WHICH COMPRISES DISSOLVING THE SMOKELESS POWDER BASE IN A VEHICLE HAVING LEAD INCORPORATED THEREIN AND CONTAINING METHYL ETHYL KETONE AND A VOLATILE LIQUID NON-SOLVENT WHICH IS SUBSTANTIALLY MISCIBLE WITH METHYL ETHYL KETONE AND REDUCES THE MISCIBILITY OF WATER THEREWITH, AND THEREAFTER SOLIDIFYING THE GLOBULES WHILE SUSPENDED IN THE AQUEOUS MEDIUM.
Claim 2
Dependent Claim
102 words
IN THE MANUFACTURE OF POWDER GRAINS BY A PROCESS WHICH INVOLVES DISPERSING GLOBULES OF LACQUER CONTAINING A SMOKELESS POWDER BASE AND A VEHICLE IN AN AQUEOUS MEDIUM AND THEREAFTER SOLIDIFYING THE GLOBULES WHILE DISPERSED, THE METHOD OF SHAPING AND SOLIDIFYING LACQUER GLOBULES INTO GELATINIZED DROPLETS OF SMOKELESS POWDER BASE HAVING LEAD THEREIN WHICH COMPRISES DISSOLVING THE SMOKELESS POWDER BASE IN A VEHICLE HAVING LEAD INCORPORATED THEREIN AND CONTAINING METHYL ETHYL KETONE AND A VOLATILE LIQUID NON-SOLVENT WHICH IS SUBSTANTIALLY MISCIBLE WITH METHYL ETHYL KETONE AND REDUCES THE MISCIBILITY OF WATER THEREWITH, AND THEREAFTER SOLIDIFYING THE GLOBULES WHILE SUSPENDED IN THE AQUEOUS MEDIUM.
Claim 3
Dependent Claim
25 words
A SUBSTANTIALLY SPHERICAL SMOKELESS POWDER BASE GRAIN HAVING A MATERIAL DISPERSED THEREIN SELECTED FROM THE GROUP CONSISTING OF METALLIC LEAD, LEAD SALTS, AND LEAD OXIDES.
Claim 4
Dependent Claim
25 words
A SUBSTANTIALLY SPHERICAL SMOKELESS POWDER BASE GRAIN HAVING A MATERIAL DISPERSED THEREIN SELECTED FROM THE GROUP CONSISTING OF METALLIC LEAD, LEAD SALTS, AND LEAD OXIDES.
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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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |