US3679384A
Expired / Lapsed
US
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Method for forming a honeycomb structure
Assignee: Bendix Corp
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Filing: 1970-05-07
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Granted: 1972-07-25
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Expires: 1990-05-07
Abstract
Abstract A method for forming a honeycomb structure from glass tubes and the resulting article including arranging the tubes in a stack, heating the stack, and maintaining the interstitial spaces of the stack at a predetermined gas pressure no greater than that of the remainder of the stack, in order to radially expand the individual tubes of the stack and reduce the cross sectional size of interstitial spaces between tubes a predetermined amount. The method can be used to change the cross sectional shape of a round tube of the stack to other shapes such as hexagonal or square.
Inventors
- 👤 William B Colson
- 👤 Herbert C Niedermiller
- 👤 Bagdasar Deradoorian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B3/18; B32B3/20; C; C03; C03B; C03B23/00; C03B23/20; C03B23/207; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/028; H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; B32B2305/00; B32B2305/02; B32B2305/024; B32B2309/00; B32B2309/02; B32B2309/12; C03B2203/00; C03B2203/02; C03B2203/04; C03B2203/10; C03B2203/12; C03B2203/14; C03B2203/16; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |