US3030216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition
Assignee: Lockheed Martin Corp
•
Filing: 1958-11-04
•
Granted: 1962-04-17
•
Expires: 1978-11-04
Abstract
No abstract record available.
Inventors
- 👤 Lewis W Chantler
- 👤 William O Hund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/10; C04B35/101; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/66; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3217; C04B2235/34; C04B2235/349; C04B2235/44; C04B2235/449; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A REFACTORY RAMMING MIXTURES CONSISTING ESSENTIALLY OF DEAD-BURNED MAGNESITE AND BETWEEN ABOUT 0.25% AND ABOUT 2.5% OF SALT COMPONENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS OF TARTARIC ACID AND MIXTURES THEREOF.
Claim 2
Dependent Claim
34 words
A REFACTORY RAMMING MIXTURES CONSISTING ESSENTIALLY OF DEAD-BURNED MAGNESITE AND BETWEEN ABOUT 0.25% AND ABOUT 2.5% OF SALT COMPONENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS OF TARTARIC ACID AND MIXTURES THEREOF.
References Cited (Backward Citations)
US2501336A
Cited
US2855318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |