US3553045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming two-layered expanded filamentous mat in which one layer is compressed to form a skin-back layer
Assignee: American Air Filter Co Inc
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Filing: 1965-11-23
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Granted: 1971-01-05
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Expires: 1985-11-23
Abstract
Abstract A METHOD FOR MANUFACTURING A LAMINATED FILAMENTOUS MATS AND FOR FORMING A SKIN-BACK LAYER OF HIGH FILAMENT DENSITY ON ONE SIDE OF SUCH EXPANDED FILAMENTOUS MATS.
Inventors
- 👤 George J Heh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:05
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |