US3540118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of framing a multiple glazed unit
Assignee: PPG Industries Inc
•
Filing: 1968-02-20
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Granted: 1970-11-17
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Expires: 1988-02-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:54
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/0026; B29C63/0034; E; E06; E06B; E06B3/00; E06B3/66; E06B3/6621; E06B3/673; E06B3/67339; E06B3/67356; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/53; Y10T29/53657
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US397524A
Cited
US1556234A
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US2670531A
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US2635332A
Cited
US3168917A
Cited
US3319708A
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 |