US3250829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a combustioninhibited solid propellant grain
Assignee: ATK Launch Systems LLC
•
Filing: 1963-03-03
•
Granted: 1966-05-10
•
Expires: 1983-03-03
Abstract
No abstract record available.
Inventors
- 👤 Bobby M Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:16
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/26; F02K9/24; Y; Y10; Y10S; Y10S425/00; Y10S425/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF APPLYING A COMBUSTION-INHIBITING COATING TO AT LEAST A PORTION OF THE IGNITION SURFACE OF A SOLID PROPELLANT GRAIN IN A ROCKET ENGINE TO REDUCE THE INITIAL PRESSURE PEAK PRODUCED BY THE BURNING PROPELLANT WHICH COMPRISES THE STEPS OF, APPLYING THE COMBUSTION INHIBITING COATING OF THE SURFACE OF A MANDREL, CASTING THE PROPELLANT AROUND THE MANDREL, BONDING THE COATING TO THE PROPELLAND DURING CURING OF THE LATTER, AND THEN WITHDRAWING THE MANDREL TO FORM AN IGNITION SURFACE ON THE GRAIN ADJACENT THE COMBUSTION-INHIBITING COATING THEREON.
Claim 2
Independent Claim
87 words
A METHOD OF APPLYING A COMBUSTION-INHIBITING COATING TO AT LEAST A PORTION OF THE IGNITION SURFACE OF A SOLID PROPELLANT GRAIN IN A ROCKET ENGINE TO REDUCE THE INITIAL PRESSURE PEAK PRODUCED BY THE BURNING PROPELLANT WHICH COMPRISES THE STEPS OF, APPLYING THE COMBUSTION INHIBITING COATING OF THE SURFACE OF A MANDREL, CASTING THE PROPELLANT AROUND THE MANDREL, BONDING THE COATING TO THE PROPELLAND DURING CURING OF THE LATTER, AND THEN WITHDRAWING THE MANDREL TO FORM AN IGNITION SURFACE ON THE GRAIN ADJACENT THE COMBUSTION-INHIBITING COATING THEREON.
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |