US3136766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active ethers of nu-(hydroxymethyl)-lactams
Assignee: GAF Chemicals Corp
•
Filing: 1960-11-04
•
Granted: 1964-06-09
•
Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Dolores M Buc
- 👤 Raymond L Mayhew
- 👤 Earl P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:04
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C07D265/00; C07D265/28; C07D265/30; C07D265/32; G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A CHEMICAL COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
A CHEMICAL COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
6 words
THE CHEMICAL COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
6 words
THE CHEMICAL COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2115250A
Cited
US2170111A
Cited
US2191922A
Cited
US2287465A
Cited
US2800487A
Cited
US2941967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |