US3135044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightwight porous structures and methods of making same
Assignee: RTX Corp
•
Filing: 1959-06-04
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Granted: 1964-06-02
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Expires: 1979-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Morris W Mote
- 👤 Roland B Fischer
- 👤 Glenn R Schaer
- 👤 Benjamin C Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; B; B22; B22F; B22F1/00; B22F1/06; B22F1/065; B22F1/0655; B64; B64C; B64C3/00; C; C23; C23F; C23F1/00; C25; C25D; C25D1/00; C25D1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49694; Y10T29/4981; Y10T29/49826; Y10T29/49861; Y10T29/49879; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF MAKING THIN-WALLED, HOLLOW, SPHERES OF A STRUCTURAL METAL COMPRISING THE STEPS OF FORMING PERFORATED BEADS, ELECTROFORMING A LAYER OF A STRUCTURAL METAL ON SAID BEADS, AND REMOVING THE BEAD MATERIAL FROM INSIDE SAID ELECTROFORMED METAL LAYER THROUGH SAID PERFORATIONS LEAVING A SPHERE FORMED OF THE ELECTROFORMED METAL SHELL.
Claim 2
Independent Claim
51 words
THE METHOD OF MAKING THIN-WALLED, HOLLOW, SPHERES OF A STRUCTURAL METAL COMPRISING THE STEPS OF FORMING PERFORATED BEADS, ELECTROFORMING A LAYER OF A STRUCTURAL METAL ON SAID BEADS, AND REMOVING THE BEAD MATERIAL FROM INSIDE SAID ELECTROFORMED METAL LAYER THROUGH SAID PERFORATIONS LEAVING A SPHERE FORMED OF THE ELECTROFORMED METAL SHELL.
References Cited (Backward Citations)
US1060361A
Cited
US1266485A
Cited
US1587404A
Cited
US1591372A
Cited
US2042635A
Cited
US2022234A
Cited
US2423870A
Cited
US2499977A
Cited
DE858058C
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US2602614A
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US2682700A
Cited
US2900713A
Cited
US2936519A
Cited
US2806509A
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US2956651A
Cited
US2985411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |