US3447229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for captive washer assembling
Assignee: NL Industries Inc
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Filing: 1966-12-27
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Granted: 1969-06-03
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Robert L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:05
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/04; B23P19/08; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/96; Y10T; Y10T29/00; Y10T29/49; Y10T29/49799; Y10T29/49826; Y10T29/49833; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49945; Y10T29/51; Y10T29/5176; Y10T29/53; Y10T29/53478
Claims Analysis
Total Claims: 0
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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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |