US3481087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherproofing system and envelope panel therefor
Assignee: Individual
•
Filing: 1968-02-05
•
Granted: 1969-12-02
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Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 Robert M Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:30
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/10; E04D3/00; E04D3/35; E04D3/357; E04D3/38; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24496; Y10T428/2457; Y10T428/24587; Y10T428/24612; Y10T428/249921; Y10T428/249953; Y10T428/249987
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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |