US3431335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making filters
Assignee: G S STAUNTON AND CO Inc
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Filing: 1966-10-20
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Granted: 1969-03-04
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Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Dan C Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:15
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; B01; B01D; B01D46/00; B01D46/10; B01D46/12; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29C44/34; B29C44/56; B29C67/00; B29C67/0044; B29C69/00; F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; B29C48/00; B29C48/03; B29C48/07; B29C48/12; B29C48/13; B29K; B29K2105/00; B29K2105/04; B29K2105/25; B29K2105/253; B29K2105/255; B29L; B29L2031/00; B29L2031/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF MAKING A FILTER ELEMENT FROM A BATT OF FOAM MATERIAL AND COMPRISING THE STEPS OF: MAKING A CUT PARTIALLY THROUGH SAID BUTT AROUND THE PERIPHERY THEREOF AND INWARDLY SPACED FROM THE EDGES THEREOF; AND COMPRESSING AND HEATING THE PORTIONS OF SAID BATT BETWEEN SAID CUT AND SAID EDGES OF SAID BATT TO FORM A PERIPHERAL FLANGE ADJACENT ONE END OF SAID BATT.
Claim 2
Independent Claim
65 words
A METHOD OF MAKING A FILTER ELEMENT FROM A BATT OF FOAM MATERIAL AND COMPRISING THE STEPS OF: MAKING A CUT PARTIALLY THROUGH SAID BUTT AROUND THE PERIPHERY THEREOF AND INWARDLY SPACED FROM THE EDGES THEREOF; AND COMPRESSING AND HEATING THE PORTIONS OF SAID BATT BETWEEN SAID CUT AND SAID EDGES OF SAID BATT TO FORM A PERIPHERAL FLANGE ADJACENT ONE END OF SAID BATT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |