US3257803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal boundary construction
Assignee: GTE Sylvania Inc
•
Filing: 1961-05-08
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Granted: 1966-06-28
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Robert B Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:14
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/974; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/94; Y10T; Y10T29/00; Y10T29/49; Y10T29/49346; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/30; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A ROCKET NOZZLE COMPISING AN ANNULAR FORM OF PYROLYTIC GRAPHITE, A PLEXUS OF TUNGSTEN FILAMENTS WITHIN SAID ANNULAR FORM, AND A COATING OF TANTALUM CARBIDE EMBEDDING SAID FILAMENTS AND BONDED TO SAID FORM.
Claim 2
Dependent Claim
33 words
A ROCKET NOZZLE COMPISING AN ANNULAR FORM OF PYROLYTIC GRAPHITE, A PLEXUS OF TUNGSTEN FILAMENTS WITHIN SAID ANNULAR FORM, AND A COATING OF TANTALUM CARBIDE EMBEDDING SAID FILAMENTS AND BONDED TO SAID FORM.
References Cited (Backward Citations)
US386306A
Cited
US533000A
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FR492687A
Cited
GB122968A
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US1853556A
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US2166300A
Cited
US2222058A
Cited
US2373038A
Cited
GB586183A
Cited
FR1112030A
Cited
US2849860A
Cited
US2835107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |