Patent US3022735A successfully refreshed from Google Patents.
US3022735A
Expired / Lapsed
US
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Solid rocket propellants
Assignee: Phillips Petroleum Co
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Filing: 1957-10-10
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Granted: 1962-02-27
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Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jack F Eberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:13
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10; F02K9/18; C; C06; C06B; C06B45/00; C06B45/12; F02K9/32; F02K9/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A CYLINDRICAL ROCKET GRAIN COMPRISING A PLURALITY OF BONDED, IMPERFORATE BLOCKS OF PROPELLANT OF THE COMPOSITE TYPE COMPRISING A SOLID INORGANIC OXIDIZING SALT AND A RUBBERY BINDER, THE OUTER CYLINDRICAL SURFACE AND ENDS OF SAID GRAIN BEING COVERED WITH RESTRICTING MATERIAL, SAID GRAIN HAVING AN AXIAL PERFORATION WHICH IS STAR-SHAPED IN CROSS-SECTION, SAID PERFORATION BEING DEFINED BY AN EXPOSED INITIAL BURNING SURFACE OF SAID GRAIN, SAID BLOCKS OF PROPELLANT ASSEMBLED TO FORM CIRCUMFERENTIALLY ALTERNATE WEDGES AND TRUNCATED WEDGES, A PLURALITY OF THIN, PARALLEL METAL WIRES UNIFORMLY SPACED AND EMBEDDED IN AT LEAST
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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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |