US3264073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel metal microspheres and their manufacture
Assignee: Individual
•
Filing: 1965-06-09
•
Granted: 1966-08-02
•
Expires: 1985-06-09
Abstract
No abstract record available.
Inventors
- 👤 Charles R Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:16
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1112; B22F1/00; B22F1/06; B22F1/065; B22F1/0655; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C23; C23C; C23C16/00; C23C16/01; Y; Y10; Y10S; Y10S75/00; Y10S75/953; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/12; Y10T428/12181; Y10T428/12479; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A METHOD FOR PREPARING UNITARY, HOLLOW, METAL MICROSPHERES COMPRISING THE STEPS OF HEATING PHENOLIC MICROBALLOONS UNDER AN INERT ATMOSPHERE TO A TEMPERATURE SUFFICIENT TO COKE SAID MICROBALLOONS THEREBY FORMING CARBON MICROSPHERES, APPLYING A METAL COATING TO SAID CARBON MICROSPHERES AND THEREAFTER REMOVING THE CARBON TO FORM METAL MICROSPHERES.
Claim 2
Independent Claim
48 words
A METHOD FOR PREPARING UNITARY, HOLLOW, METAL MICROSPHERES COMPRISING THE STEPS OF HEATING PHENOLIC MICROBALLOONS UNDER AN INERT ATMOSPHERE TO A TEMPERATURE SUFFICIENT TO COKE SAID MICROBALLOONS THEREBY FORMING CARBON MICROSPHERES, APPLYING A METAL COATING TO SAID CARBON MICROSPHERES AND THEREAFTER REMOVING THE CARBON TO FORM METAL MICROSPHERES.
Claim 3
Dependent Claim
25 words
A LOW DENSITY, HIGH STRENGTH, TUNGSTEN CELLULAR STRUCTURE COMPRISING BONDED TUNGSTEN METAL MICROSPHERES, SAID STRUCTURE HAVING A SINTERED DENSITY OF BETWEEN 1.9 AND 4.2 GRAMS/CC.
Claim 4
Dependent Claim
25 words
A LOW DENSITY, HIGH STRENGTH, TUNGSTEN CELLULAR STRUCTURE COMPRISING BONDED TUNGSTEN METAL MICROSPHERES, SAID STRUCTURE HAVING A SINTERED DENSITY OF BETWEEN 1.9 AND 4.2 GRAMS/CC.
References Cited (Backward Citations)
US3052967A
Cited
US3078552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |