US3540988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating method
Assignee: Bunker Ramo Corp
•
Filing: 1966-07-22
•
Granted: 1970-11-17
•
Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Paul E Wells
- 👤 John S Davis
- 👤 Ronald E Lee
- 👤 David R Boles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:44
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/14; H01F41/24; H01F41/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA621587A
Cited
US1094507A
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US2640789A
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US2978389A
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US3047475A
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US3031648A
Cited
US3098803A
Cited
US3300767A
Cited
US3141837A
Cited
US3330631A
Cited
US3436813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |