Patent US3218907A successfully refreshed from Google Patents.
US3218907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Felting process for making combustible cartridge cases
Assignee: Individual
•
Filing: 1963-10-23
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Granted: 1965-11-23
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Keith F Beal
- 👤 Erik R Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:26
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/18; F42B5/188; Y; Y10; Y10S; Y10S102/00; Y10S102/70; Y10S102/702
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE PROCESS OF PREPARING A COMBUSTIBLE CARTRIDGE CASE WHICH COMPRISES: (1) SLURRYING NITROCELLULOSIC FIBERS IN WATER; (2) SUCKING THE FIBERS ON A SHAPED PERFORATED MANDREL FROM THE SLURRY UNTIL A SUITABLE PREFORM IS OBTAINED; (3) DEPOSITING ON THE PREFORM CELLULOSE FROM ANOTHER SLURRY FOR ADDITIONAL STRENGTH; (4) REMOVING THE PREFORM TO A PERFORATED DIE AND
Claim 2
Dependent Claim
55 words
THE PROCESS OF PREPARING A COMBUSTIBLE CARTRIDGE CASE WHICH COMPRISES: (1) SLURRYING NITROCELLULOSIC FIBERS IN WATER; (2) SUCKING THE FIBERS ON A SHAPED PERFORATED MANDREL FROM THE SLURRY UNTIL A SUITABLE PREFORM IS OBTAINED; (3) DEPOSITING ON THE PREFORM CELLULOSE FROM ANOTHER SLURRY FOR ADDITIONAL STRENGTH; (4) REMOVING THE PREFORM TO A PERFORATED DIE AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |